400597774 has 4 divisors (see below), whose sum is σ = 600896664. Its totient is φ = 200298886.

The previous prime is 400597723. The next prime is 400597777. The reversal of 400597774 is 477795004.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 400597774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400597777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100149442 + ... + 100149445.

It is an arithmetic number, because the mean of its divisors is an integer number (150224166).

Almost surely, 2^400597774 is an apocalyptic number.

400597774 is a deficient number, since it is larger than the sum of its proper divisors (200298890).

400597774 is a wasteful number, since it uses less digits than its factorization.

400597774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200298889.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 400597774 is about 20014.9387708282. The cubic root of 400597774 is about 737.1731534166.

The spelling of 400597774 in words is "four hundred million, five hundred ninety-seven thousand, seven hundred seventy-four".