15012780 has 48 divisors (see below), whose sum is σ = 42837984. Its totient is φ = 3927040.

The previous prime is 15012769. The next prime is 15012839. The reversal of 15012780 is 8721051.

15012780 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15012780.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 820 + ... + 5540.

It is an arithmetic number, because the mean of its divisors is an integer number (892458).

Almost surely, 2^15012780 is an apocalyptic number.

15012780 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 15012780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21418992).

15012780 is an abundant number, since it is smaller than the sum of its proper divisors (27825204).

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

15012780 is a wasteful number, since it uses less digits than its factorization.

15012780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786 (or 4784 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 15012780 is about 3874.6328858358. The cubic root of 15012780 is about 246.6912279739.

The spelling of 15012780 in words is "fifteen million, twelve thousand, seven hundred eighty".