69940816 has 40 divisors (see below), whose sum is σ = 148347648. Its totient is φ = 31680000.

The previous prime is 69940813. The next prime is 69940817. The reversal of 69940816 is 61804996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69940813) by changing a digit.

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, 70081 + ... + 71071.

Almost surely, 2^69940816 is an apocalyptic number.

It is an amenable number.

69940816 is an abundant number, since it is smaller than the sum of its proper divisors (78406832).

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

69940816 is a wasteful number, since it uses less digits than its factorization.

69940816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411 (or 1405 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 69940816 is about 8363.0625969199. The cubic root of 69940816 is about 412.0123476363.

It can be divided in two parts, 69940 and 816, that added together give a square (70756 = 266²).

The spelling of 69940816 in words is "sixty-nine million, nine hundred forty thousand, eight hundred sixteen".