401390616 has 64 divisors (see below), whose sum is σ = 1102060800. Its totient is φ = 120816000.

The previous prime is 401390609. The next prime is 401390617. The reversal of 401390616 is 616093104.

It is a super-2 number, since 2×401390616² = 322228853225718912, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401390617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34830 + ... + 44898.

It is an arithmetic number, because the mean of its divisors is an integer number (17219700).

Almost surely, 2^401390616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401390616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551030400).

401390616 is an abundant number, since it is smaller than the sum of its proper divisors (700670184).

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

401390616 is a wasteful number, since it uses less digits than its factorization.

401390616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240 (or 10236 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 401390616 is about 20034.7352365835. The cubic root of 401390616 is about 737.6591576831.

The spelling of 401390616 in words is "four hundred one million, three hundred ninety thousand, six hundred sixteen".