647020372 has 12 divisors (see below), whose sum is σ = 1142306676. Its totient is φ = 320647040.

The previous prime is 647020301. The next prime is 647020399. The reversal of 647020372 is 273020746.

It is a happy number.

647020372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10265616 + 636754756 = 3204^2 + 25234^2 .

It is a congruent number.

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, 715279 + ... + 716182.

It is an arithmetic number, because the mean of its divisors is an integer number (95192223).

Almost surely, 2^647020372 is an apocalyptic number.

It is an amenable number.

647020372 is a deficient number, since it is larger than the sum of its proper divisors (495286304).

647020372 is a wasteful number, since it uses less digits than its factorization.

647020372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431578 (or 1431576 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 647020372 is about 25436.5951337831. The cubic root of 647020372 is about 864.9134518639.

The spelling of 647020372 in words is "six hundred forty-seven million, twenty thousand, three hundred seventy-two".