649629590 has 8 divisors (see below), whose sum is σ = 1169333280. Its totient is φ = 259851832.

The previous prime is 649629587. The next prime is 649629691. The reversal of 649629590 is 95926946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32481470 + ... + 32481489.

It is an arithmetic number, because the mean of its divisors is an integer number (146166660).

Almost surely, 2^649629590 is an apocalyptic number.

649629590 is a deficient number, since it is larger than the sum of its proper divisors (519703690).

649629590 is a wasteful number, since it uses less digits than its factorization.

649629590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64962966.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 649629590 is about 25487.8321949906. The cubic root of 649629590 is about 866.0745286252.

The spelling of 649629590 in words is "six hundred forty-nine million, six hundred twenty-nine thousand, five hundred ninety".