649992434 has 32 divisors (see below), whose sum is σ = 1229268096. Its totient is φ = 250865280.

The previous prime is 649992401. The next prime is 649992437. The reversal of 649992434 is 434299946.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (649992437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36092 + ... + 51015.

It is an arithmetic number, because the mean of its divisors is an integer number (38414628).

Almost surely, 2^649992434 is an apocalyptic number.

649992434 is a deficient number, since it is larger than the sum of its proper divisors (579275662).

649992434 is a wasteful number, since it uses less digits than its factorization.

649992434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87170.

The product of its digits is 1679616, while the sum is 50.

The square root of 649992434 is about 25494.9491860643. The cubic root of 649992434 is about 866.2357443201.

The spelling of 649992434 in words is "six hundred forty-nine million, nine hundred ninety-two thousand, four hundred thirty-four".