400361384 has 8 divisors (see below), whose sum is σ = 750677610. Its totient is φ = 200180688.

The previous prime is 400361383. The next prime is 400361411. The reversal of 400361384 is 483163004.

It can be written as a sum of positive squares in only one way, i.e., 352613284 + 47748100 = 18778^2 + 6910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (400361383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25022579 + ... + 25022594.

Almost surely, 2^400361384 is an apocalyptic number.

It is an amenable number.

400361384 is a deficient number, since it is larger than the sum of its proper divisors (350316226).

400361384 is a wasteful number, since it uses less digits than its factorization.

400361384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50045179 (or 50045175 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 400361384 is about 20009.0325603214. The cubic root of 400361384 is about 737.0281246114.

The spelling of 400361384 in words is "four hundred million, three hundred sixty-one thousand, three hundred eighty-four".