403890252 has 12 divisors (see below), whose sum is σ = 942410616. Its totient is φ = 134630080.

The previous prime is 403890251. The next prime is 403890257. The reversal of 403890252 is 252098304.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (403890251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16828749 + ... + 16828772.

It is an arithmetic number, because the mean of its divisors is an integer number (78534218).

Almost surely, 2^403890252 is an apocalyptic number.

It is an amenable number.

403890252 is an abundant number, since it is smaller than the sum of its proper divisors (538520364).

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

403890252 is a wasteful number, since it uses less digits than its factorization.

403890252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33657528 (or 33657526 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 403890252 is about 20097.0209732687. The cubic root of 403890252 is about 739.1872327891.

The spelling of 403890252 in words is "four hundred three million, eight hundred ninety thousand, two hundred fifty-two".