649982928 has 160 divisors (see below), whose sum is σ = 1988444160. Its totient is φ = 179112960.

The previous prime is 649982923. The next prime is 649982933. The reversal of 649982928 is 829289946.

It is an interprime number because it is at equal distance from previous prime (649982923) and next prime (649982933).

It is a super-3 number, since 3×649982928³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649982923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1247308 + ... + 1247828.

It is an arithmetic number, because the mean of its divisors is an integer number (12427776).

Almost surely, 2^649982928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649982928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994222080).

649982928 is an abundant number, since it is smaller than the sum of its proper divisors (1338461232).

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

649982928 is a wasteful number, since it uses less digits than its factorization.

649982928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 659 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 57.

The square root of 649982928 is about 25494.7627562996. The cubic root of 649982928 is about 866.2315214622.

The spelling of 649982928 in words is "six hundred forty-nine million, nine hundred eighty-two thousand, nine hundred twenty-eight".