649388072 has 16 divisors (see below), whose sum is σ = 1270542240. Its totient is φ = 310576816.

The previous prime is 649388057. The next prime is 649388119. The reversal of 649388072 is 270883946.

It is a super-3 number, since 3×649388072³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1764458 + ... + 1764825.

It is an arithmetic number, because the mean of its divisors is an integer number (79408890).

Almost surely, 2^649388072 is an apocalyptic number.

It is an amenable number.

649388072 is a deficient number, since it is larger than the sum of its proper divisors (621154168).

649388072 is a wasteful number, since it uses less digits than its factorization.

649388072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529312 (or 3529308 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 649388072 is about 25483.0938467055. The cubic root of 649388072 is about 865.9671861650.

The spelling of 649388072 in words is "six hundred forty-nine million, three hundred eighty-eight thousand, seventy-two".