402401400 has 48 divisors (see below), whose sum is σ = 1247446200. Its totient is φ = 107306880.

The previous prime is 402401393. The next prime is 402401413. The reversal of 402401400 is 4104204.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 402401400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334735 + ... + 335934.

Almost surely, 2^402401400 is an apocalyptic number.

402401400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402401400 is an abundant number, since it is smaller than the sum of its proper divisors (845044800).

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

402401400 is a wasteful number, since it uses less digits than its factorization.

402401400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670688 (or 670679 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 402401400 is about 20059.9451644315. The cubic root of 402401400 is about 738.2778310723.

Adding to 402401400 its reverse (4104204), we get a palindrome (406505604).

The spelling of 402401400 in words is "four hundred two million, four hundred one thousand, four hundred".