1521980928 has 240 divisors, whose sum is σ = 4910841936. Its totient is φ = 467804160.

The previous prime is 1521980881. The next prime is 1521980939. The reversal of 1521980928 is 8290891251.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1616938 + ... + 1617878.

Almost surely, 2^1521980928 is an apocalyptic number.

1521980928 is a gapful number since it is divisible by the number (18) 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 1521980928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2455420968).

1521980928 is an abundant number, since it is smaller than the sum of its proper divisors (3388861008).

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

1521980928 is an frugal number, since it uses more digits than its factorization.

1521980928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 1521980928 is about 39012.5739730154. The cubic root of 1521980928 is about 1150.2786792801.

The spelling of 1521980928 in words is "one billion, five hundred twenty-one million, nine hundred eighty thousand, nine hundred twenty-eight".