649958784 has 48 divisors (see below), whose sum is σ = 1727781060. Its totient is φ = 216486400.

The previous prime is 649958753. The next prime is 649958791. The reversal of 649958784 is 487859946.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 498934 + ... + 500234.

Almost surely, 2^649958784 is an apocalyptic number.

649958784 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

649958784 is an abundant number, since it is smaller than the sum of its proper divisors (1077822276).

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

649958784 is an frugal number, since it uses more digits than its factorization.

649958784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619 (or 1306 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The square root of 649958784 is about 25494.2892428873. The cubic root of 649958784 is about 866.2207957688.

The spelling of 649958784 in words is "six hundred forty-nine million, nine hundred fifty-eight thousand, seven hundred eighty-four".