400378738 has 8 divisors (see below), whose sum is σ = 600653232. Its totient is φ = 200160996.

The previous prime is 400378729. The next prime is 400378753. The reversal of 400378738 is 837873004.

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 400378738.

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, 18681 + ... + 33907.

It is an arithmetic number, because the mean of its divisors is an integer number (75081654).

Almost surely, 2^400378738 is an apocalyptic number.

400378738 is a deficient number, since it is larger than the sum of its proper divisors (200274494).

400378738 is a wasteful number, since it uses less digits than its factorization.

400378738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28376.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 400378738 is about 20009.4662097718. The cubic root of 400378738 is about 737.0387734916.

The spelling of 400378738 in words is "four hundred million, three hundred seventy-eight thousand, seven hundred thirty-eight".