402921960 has 128 divisors (see below), whose sum is σ = 1386270720. Its totient is φ = 91775232.

The previous prime is 402921943. The next prime is 402921977. The reversal of 402921960 is 69129204.

It is an interprime number because it is at equal distance from previous prime (402921943) and next prime (402921977).

It is a super-2 number, since 2×402921960² = 324692211700483200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307627 + ... + 308933.

It is an arithmetic number, because the mean of its divisors is an integer number (10830240).

Almost surely, 2^402921960 is an apocalyptic number.

402921960 is a gapful number since it is divisible by the number (40) 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 402921960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693135360).

402921960 is an abundant number, since it is smaller than the sum of its proper divisors (983348760).

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

402921960 is a wasteful number, since it uses less digits than its factorization.

402921960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 402921960 is about 20072.9160811278. The cubic root of 402921960 is about 738.5960475800.

The spelling of 402921960 in words is "four hundred two million, nine hundred twenty-one thousand, nine hundred sixty".