70919640 has 96 divisors (see below), whose sum is σ = 251456400. Its totient is φ = 17191680.

The previous prime is 70919633. The next prime is 70919659. The reversal of 70919640 is 4691907.

70919640 is a `hidden beast` number, since 7 + 0 + 9 + 1 + 9 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 70919595 and 70919604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4995 + ... + 12914.

Almost surely, 2^70919640 is an apocalyptic number.

It is an amenable number.

70919640 is an abundant number, since it is smaller than the sum of its proper divisors (180536760).

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

70919640 is a wasteful number, since it uses less digits than its factorization.

70919640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17937 (or 17930 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 70919640 is about 8421.3799344288. The cubic root of 70919640 is about 413.9254924378.

The spelling of 70919640 in words is "seventy million, nine hundred nineteen thousand, six hundred forty".