513663390 has 32 divisors (see below), whose sum is σ = 1369769760. Its totient is φ = 136976832.

The previous prime is 513663389. The next prime is 513663401. The reversal of 513663390 is 93366315.

513663390 is a `hidden beast` number, since 5 + 13 + 6 + 633 + 9 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950959 + ... + 951498.

It is an arithmetic number, because the mean of its divisors is an integer number (42805305).

Almost surely, 2^513663390 is an apocalyptic number.

513663390 is an abundant number, since it is smaller than the sum of its proper divisors (856106370).

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

513663390 is a wasteful number, since it uses less digits than its factorization.

513663390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902473 (or 1902467 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 36.

The square root of 513663390 is about 22664.1432664021. The cubic root of 513663390 is about 800.8654124474.

It can be divided in two parts, 51366 and 3390, that added together give a square (54756 = 234²).

The spelling of 513663390 in words is "five hundred thirteen million, six hundred sixty-three thousand, three hundred ninety".