70691840 has 44 divisors (see below), whose sum is σ = 169589856. Its totient is φ = 28274688.

The previous prime is 70691839. The next prime is 70691869. The reversal of 70691840 is 4819607.

It is a self number, because there is not a number n which added to its sum of digits gives 70691840.

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, 1784 + ... + 12023.

Almost surely, 2^70691840 is an apocalyptic number.

It is an amenable number.

70691840 is an abundant number, since it is smaller than the sum of its proper divisors (98898016).

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

70691840 is a wasteful number, since it uses less digits than its factorization.

70691840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13832 (or 13814 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 70691840 is about 8407.8439566871. The cubic root of 70691840 is about 413.4818289431.

The spelling of 70691840 in words is "seventy million, six hundred ninety-one thousand, eight hundred forty".