400040746 has 8 divisors (see below), whose sum is σ = 685784160. Its totient is φ = 171446028.

The previous prime is 400040741. The next prime is 400040779. The reversal of 400040746 is 647040004.

It is a happy number.

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 400040746.

It is not an unprimeable number, because it can be changed into a prime (400040741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14287156 + ... + 14287183.

It is an arithmetic number, because the mean of its divisors is an integer number (85723020).

Almost surely, 2^400040746 is an apocalyptic number.

400040746 is a deficient number, since it is larger than the sum of its proper divisors (285743414).

400040746 is a wasteful number, since it uses less digits than its factorization.

400040746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28574348.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 400040746 is about 20001.0186240601. The cubic root of 400040746 is about 736.8313171365.

The spelling of 400040746 in words is "four hundred million, forty thousand, seven hundred forty-six".