616993090 has 32 divisors (see below), whose sum is σ = 1290764160. Its totient is φ = 207953664.

The previous prime is 616993021. The next prime is 616993103. The reversal of 616993090 is 90399616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70567 + ... + 78826.

It is an arithmetic number, because the mean of its divisors is an integer number (40336380).

Almost surely, 2^616993090 is an apocalyptic number.

616993090 is an abundant number, since it is smaller than the sum of its proper divisors (673771070).

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

616993090 is a wasteful number, since it uses less digits than its factorization.

616993090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149466.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 616993090 is about 24839.3456032964. The cubic root of 616993090 is about 851.3211703307.

The spelling of 616993090 in words is "six hundred sixteen million, nine hundred ninety-three thousand, ninety".