70565520 has 40 divisors (see below), whose sum is σ = 218753856. Its totient is φ = 18817408.

The previous prime is 70565501. The next prime is 70565527. The reversal of 70565520 is 2556507.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×70565520² = 9958985225740800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (70565527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146772 + ... + 147251.

Almost surely, 2^70565520 is an apocalyptic number.

It is an amenable number.

70565520 is an abundant number, since it is smaller than the sum of its proper divisors (148188336).

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

70565520 is a wasteful number, since it uses less digits than its factorization.

70565520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294039 (or 294033 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 70565520 is about 8400.3285650027. The cubic root of 70565520 is about 413.2353970764.

The spelling of 70565520 in words is "seventy million, five hundred sixty-five thousand, five hundred twenty".