649152490 has 36 divisors (see below), whose sum is σ = 1360427778. Its totient is φ = 222373200.

The previous prime is 649152479. The next prime is 649152509. The reversal of 649152490 is 94251946.

It can be written as a sum of positive squares in only one way, i.e., 584237241 + 64915249 = 24171^2 + 8057^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 563415 + ... + 564565.

Almost surely, 2^649152490 is an apocalyptic number.

649152490 is an abundant number, since it is smaller than the sum of its proper divisors (711275288).

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

649152490 is an equidigital number, since it uses as much as digits as its factorization.

649152490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 649152490 is about 25478.4711079766. The cubic root of 649152490 is about 865.8624563099.

Multiplying 649152490 by its sum of digits (40), we get a square (25966099600 = 161140²).

The spelling of 649152490 in words is "six hundred forty-nine million, one hundred fifty-two thousand, four hundred ninety".