400012154 has 32 divisors (see below), whose sum is σ = 629379072. Its totient is φ = 190512000.

The previous prime is 400012103. The next prime is 400012163. The reversal of 400012154 is 451210004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739124 + ... + 739664.

It is an arithmetic number, because the mean of its divisors is an integer number (19668096).

Almost surely, 2^400012154 is an apocalyptic number.

400012154 is a deficient number, since it is larger than the sum of its proper divisors (229366918).

400012154 is a wasteful number, since it uses less digits than its factorization.

400012154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 400012154 is about 20000.3038476919. The cubic root of 400012154 is about 736.8137622723.

Adding to 400012154 its reverse (451210004), we get a palindrome (851222158).

The spelling of 400012154 in words is "four hundred million, twelve thousand, one hundred fifty-four".