15420980 has 12 divisors (see below), whose sum is σ = 32384100. Its totient is φ = 6168384.

The previous prime is 15420967. The next prime is 15420991. The reversal of 15420980 is 8902451.

It can be written as a sum of positive squares in 2 ways, for example, as 3833764 + 11587216 = 1958^2 + 3404^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385505 + ... + 385544.

It is an arithmetic number, because the mean of its divisors is an integer number (2698675).

Almost surely, 2^15420980 is an apocalyptic number.

15420980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15420980 is an abundant number, since it is smaller than the sum of its proper divisors (16963120).

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

15420980 is a wasteful number, since it uses less digits than its factorization.

15420980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771058 (or 771056 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 15420980 is about 3926.9555637924. The cubic root of 15420980 is about 248.9071227725.

The spelling of 15420980 in words is "fifteen million, four hundred twenty thousand, nine hundred eighty".