523490638 has 8 divisors (see below), whose sum is σ = 856621080. Its totient is φ = 237950280.

The previous prime is 523490633. The next prime is 523490647. The reversal of 523490638 is 836094325.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 523490638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523490633) 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, 11897493 + ... + 11897536.

It is an arithmetic number, because the mean of its divisors is an integer number (107077635).

Almost surely, 2^523490638 is an apocalyptic number.

523490638 is a deficient number, since it is larger than the sum of its proper divisors (333130442).

523490638 is a wasteful number, since it uses less digits than its factorization.

523490638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23795042.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 523490638 is about 22879.9177883138. The cubic root of 523490638 is about 805.9404863831.

It can be divided in two parts, 5234906 and 38, that added together give a square (5234944 = 2288²).

The spelling of 523490638 in words is "five hundred twenty-three million, four hundred ninety thousand, six hundred thirty-eight".