401551044 has 24 divisors (see below), whose sum is σ = 952314048. Its totient is φ = 131655840.

The previous prime is 401551039. The next prime is 401551049. The reversal of 401551044 is 440155104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (401551039) and next prime (401551049).

It is a super-2 number, since 2×401551044² = 322486481874979872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401551049) 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, 273552 + ... + 275015.

It is an arithmetic number, because the mean of its divisors is an integer number (39679752).

Almost surely, 2^401551044 is an apocalyptic number.

It is an amenable number.

401551044 is an abundant number, since it is smaller than the sum of its proper divisors (550763004).

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

401551044 is a wasteful number, since it uses less digits than its factorization.

401551044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548635 (or 548633 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 401551044 is about 20038.7385830546. The cubic root of 401551044 is about 737.7574205854.

The spelling of 401551044 in words is "four hundred one million, five hundred fifty-one thousand, forty-four".