1239668520 has 64 divisors (see below), whose sum is σ = 3771411840. Its totient is φ = 325920000.

The previous prime is 1239668489. The next prime is 1239668567. The reversal of 1239668520 is 258669321.

1239668520 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64231 + ... + 81270.

It is an arithmetic number, because the mean of its divisors is an integer number (58928310).

Almost surely, 2^1239668520 is an apocalyptic number.

1239668520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1239668520 is an abundant number, since it is smaller than the sum of its proper divisors (2531743320).

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

1239668520 is a wasteful number, since it uses less digits than its factorization.

1239668520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145586 (or 145582 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1239668520 is about 35208.9267090038. The cubic root of 1239668520 is about 1074.2413309379.

The spelling of 1239668520 in words is "one billion, two hundred thirty-nine million, six hundred sixty-eight thousand, five hundred twenty".