635389952 has 36 divisors (see below), whose sum is σ = 1272754665. Its totient is φ = 317124608.

The previous prime is 635389949. The next prime is 635389987. The reversal of 635389952 is 259983536.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 497468416 + 137921536 = 22304^2 + 11744^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17824.

It is a super-2 number, since 2×635389952² = 807440782205124608, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 635389952.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1140458 + ... + 1141014.

Almost surely, 2^635389952 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 635389952

635389952 is an abundant number, since it is smaller than the sum of its proper divisors (637364713).

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

635389952 is an frugal number, since it uses more digits than its factorization.

635389952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 559 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 50.

The square root of 635389952 is about 25206.9425357380. The cubic root of 635389952 is about 859.6997112763.

Multiplying 635389952 by its sum of digits (50), we get a square (31769497600 = 178240²).

The spelling of 635389952 in words is "six hundred thirty-five million, three hundred eighty-nine thousand, nine hundred fifty-two".