523953990 has 96 divisors (see below), whose sum is σ = 1560326976. Its totient is φ = 119496960.

The previous prime is 523953973. The next prime is 523954021. The reversal of 523953990 is 99359325.

523953990 is a `hidden beast` number, since 5 + 23 + 9 + 539 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 516724 + ... + 517736.

It is an arithmetic number, because the mean of its divisors is an integer number (16253406).

Almost surely, 2^523953990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523953990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780163488).

523953990 is an abundant number, since it is smaller than the sum of its proper divisors (1036372986).

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

523953990 is a wasteful number, since it uses less digits than its factorization.

523953990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854 (or 1851 counting only the distinct ones).

The product of its (nonzero) digits is 328050, while the sum is 45.

The square root of 523953990 is about 22890.0412843664. The cubic root of 523953990 is about 806.1782009255.

The spelling of 523953990 in words is "five hundred twenty-three million, nine hundred fifty-three thousand, nine hundred ninety".