401387922 has 48 divisors (see below), whose sum is σ = 945224280. Its totient is φ = 122363136.

The previous prime is 401387891. The next prime is 401387941. The reversal of 401387922 is 229783104.

It can be written as a sum of positive squares in 4 ways, for example, as 377563761 + 23824161 = 19431^2 + 4881^2 .

It is a super-2 number, since 2×401387922² = 322224527854956168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17638 + ... + 33374.

Almost surely, 2^401387922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401387922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472612140).

401387922 is an abundant number, since it is smaller than the sum of its proper divisors (543836358).

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

401387922 is a wasteful number, since it uses less digits than its factorization.

401387922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15867 (or 15864 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 401387922 is about 20034.6680032388. The cubic root of 401387922 is about 737.6575073720.

The spelling of 401387922 in words is "four hundred one million, three hundred eighty-seven thousand, nine hundred twenty-two".