70539640 has 16 divisors (see below), whose sum is σ = 158714280. Its totient is φ = 28215840.

The previous prime is 70539619. The next prime is 70539659. The reversal of 70539640 is 4693507.

It is a super-2 number, since 2×70539640² = 9951681622659200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70539596 and 70539605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881706 + ... + 881785.

Almost surely, 2^70539640 is an apocalyptic number.

It is an amenable number.

70539640 is an abundant number, since it is smaller than the sum of its proper divisors (88174640).

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

70539640 is a wasteful number, since it uses less digits than its factorization.

70539640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763502 (or 1763498 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 70539640 is about 8398.7880078021. The cubic root of 70539640 is about 413.1848726854.

The spelling of 70539640 in words is "seventy million, five hundred thirty-nine thousand, six hundred forty".