70657040 has 20 divisors (see below), whose sum is σ = 164277804. Its totient is φ = 28262784.

The previous prime is 70657039. The next prime is 70657051. The reversal of 70657040 is 4075607.

It can be written as a sum of positive squares in 2 ways, for example, as 19219456 + 51437584 = 4384^2 + 7172^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 70656994 and 70657012.

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, 441527 + ... + 441686.

Almost surely, 2^70657040 is an apocalyptic number.

It is an amenable number.

70657040 is an abundant number, since it is smaller than the sum of its proper divisors (93620764).

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

70657040 is a wasteful number, since it uses less digits than its factorization.

70657040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883226 (or 883220 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 70657040 is about 8405.7742058659. The cubic root of 70657040 is about 413.4139685439.

The spelling of 70657040 in words is "seventy million, six hundred fifty-seven thousand, forty".