400099996 has 12 divisors (see below), whose sum is σ = 730617552. Its totient is φ = 191352128.

The previous prime is 400099949. The next prime is 400100009. The reversal of 400099996 is 699990004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174365 + ... + 2174548.

It is an arithmetic number, because the mean of its divisors is an integer number (60884796).

Almost surely, 2^400099996 is an apocalyptic number.

400099996 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

400099996 is a deficient number, since it is larger than the sum of its proper divisors (330517556).

400099996 is a wasteful number, since it uses less digits than its factorization.

400099996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348940 (or 4348938 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 400099996 is about 20002.4997437820. The cubic root of 400099996 is about 736.8676926814.

It can be divided in two parts, 40009 and 9996, that added together give a palindrome (50005).

The spelling of 400099996 in words is "four hundred million, ninety-nine thousand, nine hundred ninety-six".