649023770 has 16 divisors (see below), whose sum is σ = 1208527560. Its totient is φ = 250657344.

The previous prime is 649023763. The next prime is 649023787. The reversal of 649023770 is 77320946.

649023770 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 4 ways, for example, as 367757329 + 281266441 = 19177^2 + 16771^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1118717 + ... + 1119296.

Almost surely, 2^649023770 is an apocalyptic number.

649023770 is a deficient number, since it is larger than the sum of its proper divisors (559503790).

649023770 is a wasteful number, since it uses less digits than its factorization.

649023770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238049.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 649023770 is about 25475.9449285007. The cubic root of 649023770 is about 865.8052221034.

The spelling of 649023770 in words is "six hundred forty-nine million, twenty-three thousand, seven hundred seventy".