70983640 has 64 divisors (see below), whose sum is σ = 196580160. Its totient is φ = 22464000.

The previous prime is 70983637. The next prime is 70983697. The reversal of 70983640 is 4638907.

It is a self number, because there is not a number n which added to its sum of digits gives 70983640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6111 + ... + 13390.

It is an arithmetic number, because the mean of its divisors is an integer number (3071565).

Almost surely, 2^70983640 is an apocalyptic number.

70983640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

70983640 is an abundant number, since it is smaller than the sum of its proper divisors (125596520).

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

70983640 is a wasteful number, since it uses less digits than its factorization.

70983640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19532 (or 19528 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 70983640 is about 8425.1789298507. The cubic root of 70983640 is about 414.0499679084.

The spelling of 70983640 in words is "seventy million, nine hundred eighty-three thousand, six hundred forty".