402775240 has 32 divisors (see below), whose sum is σ = 1035708480. Its totient is φ = 138094272.

The previous prime is 402775223. The next prime is 402775291. The reversal of 402775240 is 42577204.

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 7 ways as a sum of consecutive naturals, for example, 718962 + ... + 719521.

It is an arithmetic number, because the mean of its divisors is an integer number (32365890).

Almost surely, 2^402775240 is an apocalyptic number.

402775240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402775240 is an abundant number, since it is smaller than the sum of its proper divisors (632933240).

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

402775240 is a wasteful number, since it uses less digits than its factorization.

402775240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438501 (or 1438497 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 402775240 is about 20069.2610725956. The cubic root of 402775240 is about 738.5063859092.

The spelling of 402775240 in words is "four hundred two million, seven hundred seventy-five thousand, two hundred forty".