69968990 has 64 divisors (see below), whose sum is σ = 161796096. Its totient is φ = 21174912.

The previous prime is 69968933. The next prime is 69969019. The reversal of 69968990 is 9986996.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19259 + ... + 22601.

It is an arithmetic number, because the mean of its divisors is an integer number (2528064).

Almost surely, 2^69968990 is an apocalyptic number.

69968990 is an abundant number, since it is smaller than the sum of its proper divisors (91827106).

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

69968990 is a wasteful number, since it uses less digits than its factorization.

69968990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393.

The product of its (nonzero) digits is 1889568, while the sum is 56.

The square root of 69968990 is about 8364.7468580944. The cubic root of 69968990 is about 412.0676633457.

The spelling of 69968990 in words is "sixty-nine million, nine hundred sixty-eight thousand, nine hundred ninety".