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67495680 = 28355731
BaseRepresentation
bin1000000010111…
…10011100000000
311201000010200000
410001132130000
5114234330210
610410400000
71446463260
oct401363400
9151003600
1067495680
113511055a
121a730000
1310ca2995
148d6d7a0
155dd3ac0
hex405e700

67495680 has 432 divisors, whose sum is σ = 285702144. Its totient is φ = 14929920.

The previous prime is 67495651. The next prime is 67495699. The reversal of 67495680 is 8659476.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2177265 + ... + 2177295.

Almost surely, 267495680 is an apocalyptic number.

67495680 is a gapful number since it is divisible by the number (60) 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 67495680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142851072).

67495680 is an abundant number, since it is smaller than the sum of its proper divisors (218206464).

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

67495680 is an equidigital number, since it uses as much as digits as its factorization.

67495680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 67495680 is about 8215.5754515432. The cubic root of 67495680 is about 407.1539561676.

The spelling of 67495680 in words is "sixty-seven million, four hundred ninety-five thousand, six hundred eighty".