402880 has 28 divisors (see below), whose sum is σ = 960120. Its totient is φ = 161024.

The previous prime is 402869. The next prime is 402881. The reversal of 402880 is 88204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310 + ... + 949.

It is an arithmetic number, because the mean of its divisors is an integer number (34290).

2⁴⁰²⁸⁸⁰ is an apocalyptic number.

402880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402880 is an abundant number, since it is smaller than the sum of its proper divisors (557240).

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

402880 is a wasteful number, since it uses less digits than its factorization.

402880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 402880 is about 634.7282883250. The cubic root of 402880 is about 73.8570407738.

The spelling of 402880 in words is "four hundred two thousand, eight hundred eighty".