69978996 has 18 divisors (see below), whose sum is σ = 176891442. Its totient is φ = 23326320.

The previous prime is 69978983. The next prime is 69979031. The reversal of 69978996 is 69987996.

It can be written as a sum of positive squares in only one way, i.e., 69956496 + 22500 = 8364^2 + 150^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 971895 + ... + 971966.

Almost surely, 2^69978996 is an apocalyptic number.

It is an amenable number.

69978996 is an abundant number, since it is smaller than the sum of its proper divisors (106912446).

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

69978996 is a wasteful number, since it uses less digits than its factorization.

69978996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943871 (or 1943866 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 69978996 is about 8365.3449420810. The cubic root of 69978996 is about 412.0873051542.

The spelling of 69978996 in words is "sixty-nine million, nine hundred seventy-eight thousand, nine hundred ninety-six".