649242998 has 16 divisors (see below), whose sum is σ = 993613824. Its totient is φ = 318089640.

The previous prime is 649242989. The next prime is 649243009. The reversal of 649242998 is 899242946.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12911 + ... + 38277.

It is an arithmetic number, because the mean of its divisors is an integer number (62100864).

Almost surely, 2^649242998 is an apocalyptic number.

649242998 is a deficient number, since it is larger than the sum of its proper divisors (344370826).

649242998 is a wasteful number, since it uses less digits than its factorization.

649242998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25627.

The product of its digits is 2239488, while the sum is 53.

The square root of 649242998 is about 25480.2472123015. The cubic root of 649242998 is about 865.9026953593.

The spelling of 649242998 in words is "six hundred forty-nine million, two hundred forty-two thousand, nine hundred ninety-eight".