69240640 has 56 divisors (see below), whose sum is σ = 188439552. Its totient is φ = 23738880.

The previous prime is 69240629. The next prime is 69240641. The reversal of 69240640 is 4604296.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69240641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13216 + ... + 17695.

It is an arithmetic number, because the mean of its divisors is an integer number (3364992).

Almost surely, 2^69240640 is an apocalyptic number.

It is an amenable number.

69240640 is an abundant number, since it is smaller than the sum of its proper divisors (119198912).

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

69240640 is a wasteful number, since it uses less digits than its factorization.

69240640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30935 (or 30925 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 69240640 is about 8321.0960816469. The cubic root of 69240640 is about 410.6328517349.

The spelling of 69240640 in words is "sixty-nine million, two hundred forty thousand, six hundred forty".