400678930 has 8 divisors (see below), whose sum is σ = 721222092. Its totient is φ = 160271568.

The previous prime is 400678913. The next prime is 400678951. The reversal of 400678930 is 39876004.

It can be written as a sum of positive squares in 2 ways, for example, as 388365849 + 12313081 = 19707^2 + 3509^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 400678930.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20033937 + ... + 20033956.

Almost surely, 2^400678930 is an apocalyptic number.

400678930 is a deficient number, since it is larger than the sum of its proper divisors (320543162).

400678930 is a wasteful number, since it uses less digits than its factorization.

400678930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40067900.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 400678930 is about 20016.9660538254. The cubic root of 400678930 is about 737.2229306818. Note that the first 3 decimals are identical.

The spelling of 400678930 in words is "four hundred million, six hundred seventy-eight thousand, nine hundred thirty".