400320026 has 16 divisors (see below), whose sum is σ = 606210048. Its totient is φ = 198258000.

The previous prime is 400320017. The next prime is 400320047. The reversal of 400320026 is 620023004.

It is a super-2 number, since 2×400320026² = 320512246433281352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400319986 and 400320013.

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, 113936 + ... + 117396.

It is an arithmetic number, because the mean of its divisors is an integer number (37888128).

Almost surely, 2^400320026 is an apocalyptic number.

400320026 is a deficient number, since it is larger than the sum of its proper divisors (205890022).

400320026 is a wasteful number, since it uses less digits than its factorization.

400320026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400320026 is about 20007.9990503798. Note that the first 3 decimals coincide. The cubic root of 400320026 is about 737.0027449918.

The spelling of 400320026 in words is "four hundred million, three hundred twenty thousand, twenty-six".