400535504 has 120 divisors (see below), whose sum is σ = 895359360. Its totient is φ = 172965888.

The previous prime is 400535467. The next prime is 400535537. The reversal of 400535504 is 405535004.

It is a congruent number.

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, 4129184 + ... + 4129280.

It is an arithmetic number, because the mean of its divisors is an integer number (7461328).

Almost surely, 2^400535504 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 400535504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447679680).

400535504 is an abundant number, since it is smaller than the sum of its proper divisors (494823856).

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

400535504 is a wasteful number, since it uses less digits than its factorization.

400535504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 400535504 is about 20013.3831223009. The cubic root of 400535504 is about 737.1349553753.

The spelling of 400535504 in words is "four hundred million, five hundred thirty-five thousand, five hundred four".