402540924 has 48 divisors (see below), whose sum is σ = 951350400. Its totient is φ = 132463296.

The previous prime is 402540881. The next prime is 402540959. The reversal of 402540924 is 429045204.

It is a junction number, because it is equal to n+sod(n) for n = 402540891 and 402540900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610507 + ... + 611165.

It is an arithmetic number, because the mean of its divisors is an integer number (19819800).

Almost surely, 2^402540924 is an apocalyptic number.

It is an amenable number.

402540924 is an abundant number, since it is smaller than the sum of its proper divisors (548809476).

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

402540924 is a wasteful number, since it uses less digits than its factorization.

402540924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 402540924 is about 20063.4225395370. The cubic root of 402540924 is about 738.3631485134.

The spelling of 402540924 in words is "four hundred two million, five hundred forty thousand, nine hundred twenty-four".