15401920 has 28 divisors (see below), whose sum is σ = 36676584. Its totient is φ = 6160640.

The previous prime is 15401917. The next prime is 15401921. The reversal of 15401920 is 2910451.

It is a junction number, because it is equal to n+sod(n) for n = 15401891 and 15401900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15401921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23746 + ... + 24385.

It is an arithmetic number, because the mean of its divisors is an integer number (1309878).

Almost surely, 2^15401920 is an apocalyptic number.

15401920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15401920 is an abundant number, since it is smaller than the sum of its proper divisors (21274664).

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

15401920 is an equidigital number, since it uses as much as digits as its factorization.

15401920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48148 (or 48138 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 15401920 is about 3924.5279970972. The cubic root of 15401920 is about 248.8045325422.

The spelling of 15401920 in words is "fifteen million, four hundred one thousand, nine hundred twenty".