70640944 has 40 divisors (see below), whose sum is σ = 152146512. Its totient is φ = 31499520.

The previous prime is 70640893. The next prime is 70640957. The reversal of 70640944 is 44904607.

It is a super-2 number, since 2×70640944² = 9980285938422272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5542 + ... + 13114.

Almost surely, 2^70640944 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 70640944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76073256).

70640944 is an abundant number, since it is smaller than the sum of its proper divisors (81505568).

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

70640944 is a wasteful number, since it uses less digits than its factorization.

70640944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7645 (or 7639 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 70640944 is about 8404.8167142419. The cubic root of 70640944 is about 413.3825736227.

The spelling of 70640944 in words is "seventy million, six hundred forty thousand, nine hundred forty-four".