400973938 has 8 divisors (see below), whose sum is σ = 612809388. Its totient is φ = 196704144.

The previous prime is 400973899. The next prime is 400973941. The reversal of 400973938 is 839379004.

It can be written as a sum of positive squares in 2 ways, for example, as 400280049 + 693889 = 20007^2 + 833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 400973894 and 400973903.

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, 1891281 + ... + 1891492.

Almost surely, 2^400973938 is an apocalyptic number.

400973938 is a deficient number, since it is larger than the sum of its proper divisors (211835450).

400973938 is a wasteful number, since it uses less digits than its factorization.

400973938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782828.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 400973938 is about 20024.3336468408. Note that the first 3 decimals coincide. The cubic root of 400973938 is about 737.4038180803.

The spelling of 400973938 in words is "four hundred million, nine hundred seventy-three thousand, nine hundred thirty-eight".