400172444 has 24 divisors (see below), whose sum is σ = 813468768. Its totient is φ = 168690240.

The previous prime is 400172431. The next prime is 400172447. The reversal of 400172444 is 444271004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400172447) 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, 115439 + ... + 118854.

It is an arithmetic number, because the mean of its divisors is an integer number (33894532).

Almost surely, 2^400172444 is an apocalyptic number.

It is an amenable number.

400172444 is an abundant number, since it is smaller than the sum of its proper divisors (413296324).

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

400172444 is a wasteful number, since it uses less digits than its factorization.

400172444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234365 (or 234363 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 400172444 is about 20004.3106354605. The cubic root of 400172444 is about 736.9121660375.

The spelling of 400172444 in words is "four hundred million, one hundred seventy-two thousand, four hundred forty-four".