401278590 has 64 divisors (see below), whose sum is σ = 1071835200. Its totient is φ = 106831872.

The previous prime is 401278583. The next prime is 401278607. The reversal of 401278590 is 95872104.

401278590 is a `hidden beast` number, since 40 + 1 + 27 + 8 + 590 = 666.

It is a super-2 number, since 2×401278590² = 322049013584776200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310666 + ... + 311954.

It is an arithmetic number, because the mean of its divisors is an integer number (16747425).

Almost surely, 2^401278590 is an apocalyptic number.

401278590 is an abundant number, since it is smaller than the sum of its proper divisors (670556610).

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

401278590 is a wasteful number, since it uses less digits than its factorization.

401278590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458 (or 2452 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 401278590 is about 20031.9392471123. The cubic root of 401278590 is about 737.5905257067.

The spelling of 401278590 in words is "four hundred one million, two hundred seventy-eight thousand, five hundred ninety".