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70000 = 24547
BaseRepresentation
bin10001000101110000
310120000121
4101011300
54220000
61300024
7411040
oct210560
9116017
1070000
1148657
1234614
1325b28
141b720
1515b1a
hex11170

70000 has 50 divisors (see below), whose sum is σ = 193688. Its totient is φ = 24000.

The previous prime is 69997. The next prime is 70001. The reversal of 70000 is 7.

It is a happy number.

It is a sliding number, since 70000 = 20000 + 50000 and 1/20000 + 1/50000 = 0.000070000.

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 5 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9997 + ... + 10003.

270000 is an apocalyptic number.

70000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96844).

70000 is an abundant number, since it is smaller than the sum of its proper divisors (123688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70000 is an equidigital number, since it uses as much as digits as its factorization.

70000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 7, while the sum is 7.

The square root of 70000 is about 264.5751311065. The cubic root of 70000 is about 41.2128529981.

The spelling of 70000 in words is "seventy thousand", and thus it is an iban number.