70987640 has 16 divisors (see below), whose sum is σ = 159722280. Its totient is φ = 28395040.

The previous prime is 70987627. The next prime is 70987643. The reversal of 70987640 is 4678907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70987643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887306 + ... + 887385.

Almost surely, 2^70987640 is an apocalyptic number.

It is an amenable number.

70987640 is an abundant number, since it is smaller than the sum of its proper divisors (88734640).

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

70987640 is a wasteful number, since it uses less digits than its factorization.

70987640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774702 (or 1774698 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 70987640 is about 8425.4163101891. The cubic root of 70987640 is about 414.0577451406.

The spelling of 70987640 in words is "seventy million, nine hundred eighty-seven thousand, six hundred forty".