400440626 has 16 divisors (see below), whose sum is σ = 627974208. Its totient is φ = 191149200.

The previous prime is 400440617. The next prime is 400440643. The reversal of 400440626 is 626044004.

It is a junction number, because it is equal to n+sod(n) for n = 400440595 and 400440604.

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, 16841 + ... + 32931.

It is an arithmetic number, because the mean of its divisors is an integer number (39248388).

Almost surely, 2^400440626 is an apocalyptic number.

400440626 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

400440626 is a deficient number, since it is larger than the sum of its proper divisors (227533582).

400440626 is a wasteful number, since it uses less digits than its factorization.

400440626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16657.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 400440626 is about 20011.0126180561. The cubic root of 400440626 is about 737.0767471244.

The spelling of 400440626 in words is "four hundred million, four hundred forty thousand, six hundred twenty-six".