401450778 has 12 divisors (see below), whose sum is σ = 869810058. Its totient is φ = 133816920.

The previous prime is 401450771. The next prime is 401450873. The reversal of 401450778 is 877054104.

It can be written as a sum of positive squares in only one way, i.e., 391921209 + 9529569 = 19797^2 + 3087^2 .

It is a super-2 number, since 2×401450778² = 322325454313610568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401450771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11151393 + ... + 11151428.

Almost surely, 2^401450778 is an apocalyptic number.

401450778 is an abundant number, since it is smaller than the sum of its proper divisors (468359280).

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

401450778 is a wasteful number, since it uses less digits than its factorization.

401450778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22302829 (or 22302826 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 401450778 is about 20036.2366226794. The cubic root of 401450778 is about 737.6960102580.

The spelling of 401450778 in words is "four hundred one million, four hundred fifty thousand, seven hundred seventy-eight".