401860778 has 8 divisors (see below), whose sum is σ = 657590400. Its totient is φ = 182663980.

The previous prime is 401860777. The next prime is 401860793. The reversal of 401860778 is 877068104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×401860778² = 322984169789530568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401860777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9133178 + ... + 9133221.

It is an arithmetic number, because the mean of its divisors is an integer number (82198800).

Almost surely, 2^401860778 is an apocalyptic number.

401860778 is a deficient number, since it is larger than the sum of its proper divisors (255729622).

401860778 is a wasteful number, since it uses less digits than its factorization.

401860778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18266412.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 401860778 is about 20046.4654739932. The cubic root of 401860778 is about 737.9470600950.

The spelling of 401860778 in words is "four hundred one million, eight hundred sixty thousand, seven hundred seventy-eight".