400774140 has 72 divisors (see below), whose sum is σ = 1309203168. Its totient is φ = 98651520.

The previous prime is 400774093. The next prime is 400774141. The reversal of 400774140 is 41477004.

It is a super-2 number, since 2×400774140² = 321239822585479200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400774141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83296 + ... + 87975.

Almost surely, 2^400774140 is an apocalyptic number.

It is an amenable number.

400774140 is an abundant number, since it is smaller than the sum of its proper divisors (908429028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400774140 is a wasteful number, since it uses less digits than its factorization.

400774140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171299 (or 171294 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 400774140 is about 20019.3441451013. The cubic root of 400774140 is about 737.2813194407.

The spelling of 400774140 in words is "four hundred million, seven hundred seventy-four thousand, one hundred forty".