523661490 has 64 divisors (see below), whose sum is σ = 1523387520. Its totient is φ = 126947520.

The previous prime is 523661483. The next prime is 523661561. The reversal of 523661490 is 94166325.

It is a happy number.

523661490 is a `hidden beast` number, since 5 + 2 + 36 + 614 + 9 + 0 = 666.

It is a super-2 number, since 2×523661490² = 548442712218040200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85189 + ... + 91128.

It is an arithmetic number, because the mean of its divisors is an integer number (23802930).

Almost surely, 2^523661490 is an apocalyptic number.

523661490 is an abundant number, since it is smaller than the sum of its proper divisors (999726030).

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

523661490 is a wasteful number, since it uses less digits than its factorization.

523661490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176344 (or 176338 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 523661490 is about 22883.6511509855. The cubic root of 523661490 is about 806.0281552968.

The spelling of 523661490 in words is "five hundred twenty-three million, six hundred sixty-one thousand, four hundred ninety".