402404440 has 32 divisors (see below), whose sum is σ = 906338160. Its totient is φ = 160796800.

The previous prime is 402404437. The next prime is 402404441. The reversal of 402404440 is 44404204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402404441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39030 + ... + 48250.

Almost surely, 2^402404440 is an apocalyptic number.

402404440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402404440 is an abundant number, since it is smaller than the sum of its proper divisors (503933720).

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

402404440 is a wasteful number, since it uses less digits than its factorization.

402404440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10323 (or 10319 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 402404440 is about 20060.0209371775. The cubic root of 402404440 is about 738.2796902101.

Adding to 402404440 its reverse (44404204), we get a palindrome (446808644).

The spelling of 402404440 in words is "four hundred two million, four hundred four thousand, four hundred forty".