400420421402 has 16 divisors (see below), whose sum is σ = 621383637600. Its totient is φ = 193293466800.

The previous prime is 400420421369. The next prime is 400420421417. The reversal of 400420421402 is 204124024004.

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, 672749 + ... + 1119567.

It is an arithmetic number, because the mean of its divisors is an integer number (38836477350).

Almost surely, 2^400420421402 is an apocalyptic number.

400420421402 is a deficient number, since it is larger than the sum of its proper divisors (220963216198).

400420421402 is a wasteful number, since it uses less digits than its factorization.

400420421402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462301.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 400420421402 its reverse (204124024004), we get a palindrome (604544445406).

The spelling of 400420421402 in words is "four hundred billion, four hundred twenty million, four hundred twenty-one thousand, four hundred two".