402240838 has 16 divisors (see below), whose sum is σ = 621195120. Its totient is φ = 195202656.

The previous prime is 402240829. The next prime is 402240851. The reversal of 402240838 is 838042204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24520 + ... + 37492.

It is an arithmetic number, because the mean of its divisors is an integer number (38824695).

Almost surely, 2^402240838 is an apocalyptic number.

402240838 is a deficient number, since it is larger than the sum of its proper divisors (218954282).

402240838 is a wasteful number, since it uses less digits than its factorization.

402240838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13431.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 402240838 is about 20055.9427103290. The cubic root of 402240838 is about 738.1796247086.

The spelling of 402240838 in words is "four hundred two million, two hundred forty thousand, eight hundred thirty-eight".