400553004 has 48 divisors (see below), whose sum is σ = 979227648. Its totient is φ = 127193088.

The previous prime is 400552993. The next prime is 400553011. The reversal of 400553004 is 400355004.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68109 + ... + 73755.

It is an arithmetic number, because the mean of its divisors is an integer number (20400576).

Almost surely, 2^400553004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400553004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489613824).

400553004 is an abundant number, since it is smaller than the sum of its proper divisors (578674644).

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

400553004 is a wasteful number, since it uses less digits than its factorization.

400553004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5934 (or 5932 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 400553004 is about 20013.8203249654. The cubic root of 400553004 is about 737.1456907314.

The spelling of 400553004 in words is "four hundred million, five hundred fifty-three thousand, four".