69978976 has 48 divisors (see below), whose sum is σ = 146059200. Its totient is φ = 32911488.

The previous prime is 69978973. The next prime is 69978977. The reversal of 69978976 is 67987996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69978971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108511 + ... + 109153.

It is an arithmetic number, because the mean of its divisors is an integer number (3042900).

Almost surely, 2^69978976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69978976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73029600).

69978976 is an abundant number, since it is smaller than the sum of its proper divisors (76080224).

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

69978976 is a wasteful number, since it uses less digits than its factorization.

69978976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 843 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 61.

The square root of 69978976 is about 8365.3437466729. The cubic root of 69978976 is about 412.0872658961.

The spelling of 69978976 in words is "sixty-nine million, nine hundred seventy-eight thousand, nine hundred seventy-six".