400403212144400 has 60 divisors (see below), whose sum is σ = 962138952429264. Its totient is φ = 160132941840000.

The previous prime is 400403212144399. The next prime is 400403212144409. The reversal of 400403212144400 is 4441212304004.

It is not an unprimeable number, because it can be changed into a prime (400403212144409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86308706 + ... + 90829505.

Almost surely, 2^{400403212144400} is an apocalyptic number.

400403212144400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400403212144400 is an abundant number, since it is smaller than the sum of its proper divisors (561735740284864).

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

400403212144400 is a wasteful number, since it uses less digits than its factorization.

400403212144400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177143880 (or 177143869 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 400403212144400 its reverse (4441212304004), we get a palindrome (404844424448404).

The spelling of 400403212144400 in words is "four hundred trillion, four hundred three billion, two hundred twelve million, one hundred forty-four thousand, four hundred".