15480780 has 192 divisors, whose sum is σ = 54190080. Its totient is φ = 3225600.

The previous prime is 15480779. The next prime is 15480853. The reversal of 15480780 is 8708451.

15480780 = T₂₆₄ + T₂₆₅ + ... + T₄₈₀.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 377560 + ... + 377600.

It is an arithmetic number, because the mean of its divisors is an integer number (282240).

Almost surely, 2^15480780 is an apocalyptic number.

15480780 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 15480780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27095040).

15480780 is an abundant number, since it is smaller than the sum of its proper divisors (38709300).

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

15480780 is a wasteful number, since it uses less digits than its factorization.

15480780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 15480780 is about 3934.5622374033. The cubic root of 15480780 is about 249.2284479460.

The spelling of 15480780 in words is "fifteen million, four hundred eighty thousand, seven hundred eighty".