70100000 has 72 divisors (see below), whose sum is σ = 172746756. Its totient is φ = 28000000.

The previous prime is 70099999. The next prime is 70100003. The reversal of 70100000 is 107.

It can be written as a sum of positive squares in 6 ways, for example, as 1607824 + 68492176 = 1268^2 + 8276^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (70100003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99650 + ... + 100350.

Almost surely, 2^70100000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86373378).

70100000 is an abundant number, since it is smaller than the sum of its proper divisors (102646756).

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

70100000 is an frugal number, since it uses more digits than its factorization.

70100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 7, while the sum is 8.

The square root of 70100000 is about 8372.5742755738. The cubic root of 70100000 is about 412.3246882827.

Adding to 70100000 its reverse (107), we get a palindrome (70100107).

The spelling of 70100000 in words is "seventy million, one hundred thousand".