402880660 has 96 divisors (see below), whose sum is σ = 1047900672. Its totient is φ = 126696960.

The previous prime is 402880633. The next prime is 402880691. The reversal of 402880660 is 66088204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328809 + ... + 330031.

It is an arithmetic number, because the mean of its divisors is an integer number (10915632).

Almost surely, 2^402880660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402880660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523950336).

402880660 is an abundant number, since it is smaller than the sum of its proper divisors (645020012).

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

402880660 is a wasteful number, since it uses less digits than its factorization.

402880660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433 (or 1431 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 402880660 is about 20071.8873053831. The cubic root of 402880660 is about 738.5708110478.

The spelling of 402880660 in words is "four hundred two million, eight hundred eighty thousand, six hundred sixty".