70689040 has 20 divisors (see below), whose sum is σ = 164352204. Its totient is φ = 28275584.

The previous prime is 70689029. The next prime is 70689061. The reversal of 70689040 is 4098607.

It can be written as a sum of positive squares in 2 ways, for example, as 44515584 + 26173456 = 6672^2 + 5116^2 .

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

It is a super-2 number, since 2×70689040² = 9993880752243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70688987 and 70689005.

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, 441727 + ... + 441886.

Almost surely, 2^70689040 is an apocalyptic number.

It is an amenable number.

70689040 is an abundant number, since it is smaller than the sum of its proper divisors (93663164).

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

70689040 is a wasteful number, since it uses less digits than its factorization.

70689040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883626 (or 883620 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 70689040 is about 8407.6774438605. The cubic root of 70689040 is about 413.4763697349.

The spelling of 70689040 in words is "seventy million, six hundred eighty-nine thousand, forty".