69985920 has 64 divisors (see below), whose sum is σ = 223086240. Its totient is φ = 18662400.

The previous prime is 69985919. The next prime is 69985963. The reversal of 69985920 is 2958996.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 69985920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16306 + ... + 20145.

Almost surely, 2^69985920 is an apocalyptic number.

69985920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

69985920 is an abundant number, since it is smaller than the sum of its proper divisors (153100320).

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

69985920 is a wasteful number, since it uses less digits than its factorization.

69985920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36473 (or 36461 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 69985920 is about 8365.7587820831. The cubic root of 69985920 is about 412.1008958913.

The spelling of 69985920 in words is "sixty-nine million, nine hundred eighty-five thousand, nine hundred twenty".