402406240 has 24 divisors (see below), whose sum is σ = 950685120. Its totient is φ = 160962432.

The previous prime is 402406223. The next prime is 402406253. The reversal of 402406240 is 42604204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257360 + ... + 1257679.

It is an arithmetic number, because the mean of its divisors is an integer number (39611880).

Almost surely, 2^402406240 is an apocalyptic number.

402406240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402406240 is an abundant number, since it is smaller than the sum of its proper divisors (548278880).

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

402406240 is a wasteful number, since it uses less digits than its factorization.

402406240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515054 (or 2515046 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 402406240 is about 20060.0658024843. The cubic root of 402406240 is about 738.2807910110.

The spelling of 402406240 in words is "four hundred two million, four hundred six thousand, two hundred forty".