401648838 has 16 divisors (see below), whose sum is σ = 825008880. Its totient is φ = 130264416.

The previous prime is 401648831. The next prime is 401648843. The reversal of 401648838 is 838846104.

It is a super-2 number, since 2×401648838² = 322643578133500488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401648838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401648831) 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, 904393 + ... + 904836.

It is an arithmetic number, because the mean of its divisors is an integer number (51563055).

Almost surely, 2^401648838 is an apocalyptic number.

401648838 is an abundant number, since it is smaller than the sum of its proper divisors (423360042).

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

401648838 is a wasteful number, since it uses less digits than its factorization.

401648838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809271.

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 401648838 is about 20041.1785581587. The cubic root of 401648838 is about 737.8173070299.

The spelling of 401648838 in words is "four hundred one million, six hundred forty-eight thousand, eight hundred thirty-eight".