401325639 has 32 divisors (see below), whose sum is σ = 631217664. Its totient is φ = 223601280.

The previous prime is 401325607. The next prime is 401325679. The reversal of 401325639 is 936523104.

It is not a de Polignac number, because 401325639 - 2⁵ = 401325607 is a prime.

It is a super-2 number, since 2×401325639² = 322124537037516642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401325679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111049 + ... + 114605.

It is an arithmetic number, because the mean of its divisors is an integer number (19725552).

Almost surely, 2^401325639 is an apocalyptic number.

401325639 is a deficient number, since it is larger than the sum of its proper divisors (229892025).

401325639 is a wasteful number, since it uses less digits than its factorization.

401325639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 401325639 is about 20033.1135622998. The cubic root of 401325639 is about 737.6193515161.

The spelling of 401325639 in words is "four hundred one million, three hundred twenty-five thousand, six hundred thirty-nine".