649391148 has 96 divisors (see below), whose sum is σ = 1929553920. Its totient is φ = 185016960.

The previous prime is 649391123. The next prime is 649391161. The reversal of 649391148 is 841193946.

649391148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324840 + ... + 326832.

It is an arithmetic number, because the mean of its divisors is an integer number (20099520).

Almost surely, 2^649391148 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 649391148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964776960).

649391148 is an abundant number, since it is smaller than the sum of its proper divisors (1280162772).

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

649391148 is a wasteful number, since it uses less digits than its factorization.

649391148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444 (or 2436 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 649391148 is about 25483.1542003732. The cubic root of 649391148 is about 865.9685534578.

The spelling of 649391148 in words is "six hundred forty-nine million, three hundred ninety-one thousand, one hundred forty-eight".