15049980 has 108 divisors (see below), whose sum is σ = 50251656. Its totient is φ = 3643200.

The previous prime is 15049967. The next prime is 15049987. The reversal of 15049980 is 8994051.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15049987) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21435 + ... + 22125.

Almost surely, 2^15049980 is an apocalyptic number.

15049980 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 15049980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25125828).

15049980 is an abundant number, since it is smaller than the sum of its proper divisors (35201676).

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

15049980 is a wasteful number, since it uses less digits than its factorization.

15049980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 15049980 is about 3879.4303705570. The cubic root of 15049980 is about 246.8948177222.

The spelling of 15049980 in words is "fifteen million, forty-nine thousand, nine hundred eighty".