493818390 has 64 divisors (see below), whose sum is σ = 1418155200. Its totient is φ = 121554432.

The previous prime is 493818389. The next prime is 493818421. The reversal of 493818390 is 93818394.

493818390 is a `hidden beast` number, since 493 + 81 + 83 + 9 + 0 = 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 31 ways as a sum of consecutive naturals, for example, 66835 + ... + 73854.

It is an arithmetic number, because the mean of its divisors is an integer number (22158675).

Almost surely, 2^493818390 is an apocalyptic number.

493818390 is an abundant number, since it is smaller than the sum of its proper divisors (924336810).

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

493818390 is a wasteful number, since it uses less digits than its factorization.

493818390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140718 (or 140712 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 493818390 is about 22222.0248852349. The cubic root of 493818390 is about 790.4160549468.

The spelling of 493818390 in words is "four hundred ninety-three million, eight hundred eighteen thousand, three hundred ninety".