400942738 has 8 divisors (see below), whose sum is σ = 687330432. Its totient is φ = 171832596.

The previous prime is 400942727. The next prime is 400942741. The reversal of 400942738 is 837249004.

It is a happy number.

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 = 400942697 and 400942706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14319370 + ... + 14319397.

It is an arithmetic number, because the mean of its divisors is an integer number (85916304).

Almost surely, 2^400942738 is an apocalyptic number.

400942738 is a deficient number, since it is larger than the sum of its proper divisors (286387694).

400942738 is a wasteful number, since it uses less digits than its factorization.

400942738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28638776.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 400942738 is about 20023.5545795446. The cubic root of 400942738 is about 737.3846916536.

The spelling of 400942738 in words is "four hundred million, nine hundred forty-two thousand, seven hundred thirty-eight".