400003836372 has 72 divisors (see below), whose sum is σ = 1155671899200. Its totient is φ = 114276400128.

The previous prime is 400003836343. The next prime is 400003836409. The reversal of 400003836372 is 273638300004.

It is a super-2 number, since 2×400003836372² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2949879 + ... + 3082497.

It is an arithmetic number, because the mean of its divisors is an integer number (16050998600).

Almost surely, 2^400003836372 is an apocalyptic number.

400003836372 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

400003836372 is an abundant number, since it is smaller than the sum of its proper divisors (755668062828).

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

400003836372 is a wasteful number, since it uses less digits than its factorization.

400003836372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144605 (or 144600 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 400003836372 in words is "four hundred billion, three million, eight hundred thirty-six thousand, three hundred seventy-two".