402667240 has 16 divisors (see below), whose sum is σ = 906001380. Its totient is φ = 161066880.

The previous prime is 402667201. The next prime is 402667267. The reversal of 402667240 is 42766204.

It can be written as a sum of positive squares in 2 ways, for example, as 362750116 + 39917124 = 19046^2 + 6318^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5033301 + ... + 5033380.

Almost surely, 2^402667240 is an apocalyptic number.

402667240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402667240 is an abundant number, since it is smaller than the sum of its proper divisors (503334140).

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

402667240 is a wasteful number, since it uses less digits than its factorization.

402667240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10066692 (or 10066688 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 402667240 is about 20066.5702101779. The cubic root of 402667240 is about 738.4403724013.

The spelling of 402667240 in words is "four hundred two million, six hundred sixty-seven thousand, two hundred forty".