649023732 has 48 divisors (see below), whose sum is σ = 1923035520. Its totient is φ = 185435136.

The previous prime is 649023731. The next prime is 649023761. The reversal of 649023732 is 237320946.

It is a happy number.

649023732 is a `hidden beast` number, since 649 + 0 + 2 + 3 + 7 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649023731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428493 + ... + 430004.

It is an arithmetic number, because the mean of its divisors is an integer number (40063240).

Almost surely, 2^649023732 is an apocalyptic number.

It is an amenable number.

649023732 is an abundant number, since it is smaller than the sum of its proper divisors (1274011788).

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

649023732 is a wasteful number, since it uses less digits than its factorization.

649023732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858517 (or 858509 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 649023732 is about 25475.9441826991. The cubic root of 649023732 is about 865.8052052059.

The spelling of 649023732 in words is "six hundred forty-nine million, twenty-three thousand, seven hundred thirty-two".