400447748 has 6 divisors (see below), whose sum is σ = 700783566. Its totient is φ = 200223872.

The previous prime is 400447727. The next prime is 400447759. The reversal of 400447748 is 847744004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 398082304 + 2365444 = 19952^2 + 1538^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055965 + ... + 50055972.

It is an arithmetic number, because the mean of its divisors is an integer number (116797261).

Almost surely, 2^400447748 is an apocalyptic number.

It is an amenable number.

400447748 is a deficient number, since it is larger than the sum of its proper divisors (300335818).

400447748 is a wasteful number, since it uses less digits than its factorization.

400447748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100111941 (or 100111939 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 38.

The square root of 400447748 is about 20011.1905692790. The cubic root of 400447748 is about 737.0811168355.

The spelling of 400447748 in words is "four hundred million, four hundred forty-seven thousand, seven hundred forty-eight".