401390493 has 8 divisors (see below), whose sum is σ = 611642688. Its totient is φ = 229365984.

The previous prime is 401390489. The next prime is 401390543. The reversal of 401390493 is 394093104.

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

It is not a de Polignac number, because 401390493 - 2² = 401390489 is a prime.

It is a super-2 number, since 2×401390493² = 322228655741566098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401390443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9556896 + ... + 9556937.

It is an arithmetic number, because the mean of its divisors is an integer number (76455336).

Almost surely, 2^401390493 is an apocalyptic number.

It is an amenable number.

401390493 is a deficient number, since it is larger than the sum of its proper divisors (210252195).

401390493 is a wasteful number, since it uses less digits than its factorization.

401390493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19113843.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 401390493 is about 20034.7321669145. The cubic root of 401390493 is about 737.6590823350.

The spelling of 401390493 in words is "four hundred one million, three hundred ninety thousand, four hundred ninety-three".