649496628 has 72 divisors (see below), whose sum is σ = 1896410880. Its totient is φ = 185237760.

The previous prime is 649496623. The next prime is 649496633. The reversal of 649496628 is 826694946.

649496628 is a `hidden beast` number, since 6 + 4 + 9 + 4 + 9 + 6 + 628 = 666.

It is an interprime number because it is at equal distance from previous prime (649496623) and next prime (649496633).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649496623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41508 + ... + 54971.

It is an arithmetic number, because the mean of its divisors is an integer number (26339040).

Almost surely, 2^649496628 is an apocalyptic number.

649496628 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

649496628 is an abundant number, since it is smaller than the sum of its proper divisors (1246914252).

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

649496628 is a wasteful number, since it uses less digits than its factorization.

649496628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96517 (or 96512 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 649496628 is about 25485.2237188532. The cubic root of 649496628 is about 866.0154370749.

The spelling of 649496628 in words is "six hundred forty-nine million, four hundred ninety-six thousand, six hundred twenty-eight".