649429128 has 48 divisors (see below), whose sum is σ = 1771551600. Its totient is φ = 214915680.

The previous prime is 649429073. The next prime is 649429133. The reversal of 649429128 is 821924946.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22438 + ... + 42453.

It is an arithmetic number, because the mean of its divisors is an integer number (36907325).

Almost surely, 2^649429128 is an apocalyptic number.

It is an amenable number.

649429128 is an abundant number, since it is smaller than the sum of its proper divisors (1122122472).

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

649429128 is a wasteful number, since it uses less digits than its factorization.

649429128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65042 (or 65035 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 649429128 is about 25483.8993876526. The cubic root of 649429128 is about 865.9854353450.

The spelling of 649429128 in words is "six hundred forty-nine million, four hundred twenty-nine thousand, one hundred twenty-eight".