400053544 has 64 divisors (see below), whose sum is σ = 833976000. Its totient is φ = 178398720.

The previous prime is 400053539. The next prime is 400053581. The reversal of 400053544 is 445350004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1716852 + ... + 1717084.

It is an arithmetic number, because the mean of its divisors is an integer number (13030875).

Almost surely, 2^400053544 is an apocalyptic number.

400053544 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400053544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416988000).

400053544 is an abundant number, since it is smaller than the sum of its proper divisors (433922456).

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

400053544 is a wasteful number, since it uses less digits than its factorization.

400053544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 400053544 is about 20001.3385552067. The cubic root of 400053544 is about 736.8391745583.

The spelling of 400053544 in words is "four hundred million, fifty-three thousand, five hundred forty-four".