15420480 has 56 divisors (see below), whose sum is σ = 48963072. Its totient is φ = 4111872.

The previous prime is 15420473. The next prime is 15420481. The reversal of 15420480 is 8402451.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 15420480.

It is not an unprimeable number, because it can be changed into a prime (15420481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7072 + ... + 8991.

Almost surely, 2^15420480 is an apocalyptic number.

15420480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15420480 is an abundant number, since it is smaller than the sum of its proper divisors (33542592).

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

15420480 is a wasteful number, since it uses less digits than its factorization.

15420480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16083 (or 16073 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 15420480 is about 3926.8919007276. The cubic root of 15420480 is about 248.9044326082.

The spelling of 15420480 in words is "fifteen million, four hundred twenty thousand, four hundred eighty".