15420900 has 72 divisors (see below), whose sum is σ = 48684384. Its totient is φ = 3737600.

The previous prime is 15420877. The next prime is 15420901. The reversal of 15420900 is 902451.

It is not an unprimeable number, because it can be changed into a prime (15420901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 964 + ... + 5636.

It is an arithmetic number, because the mean of its divisors is an integer number (676172).

Almost surely, 2^15420900 is an apocalyptic number.

15420900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15420900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24342192).

15420900 is an abundant number, since it is smaller than the sum of its proper divisors (33263484).

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

15420900 is a wasteful number, since it uses less digits than its factorization.

15420900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4701 (or 4694 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 15420900 is about 3926.9453777714. The cubic root of 15420900 is about 248.9066923501.

The spelling of 15420900 in words is "fifteen million, four hundred twenty thousand, nine hundred".