15615480 has 64 divisors (see below), whose sum is σ = 48126240. Its totient is φ = 4050432.

The previous prime is 15615461. The next prime is 15615487. The reversal of 15615480 is 8451651.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15615487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2682 + ... + 6198.

Almost surely, 2^15615480 is an apocalyptic number.

15615480 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 15615480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24063120).

15615480 is an abundant number, since it is smaller than the sum of its proper divisors (32510760).

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

15615480 is a wasteful number, since it uses less digits than its factorization.

15615480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568 (or 3564 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 15615480 is about 3951.6426963985. The cubic root of 15615480 is about 249.9492163514.

It can be divided in two parts, 15 and 615480, that added together give a triangular number (615495 = T₁₁₀₉).

The spelling of 15615480 in words is "fifteen million, six hundred fifteen thousand, four hundred eighty".