649950870 has 32 divisors (see below), whose sum is σ = 1562773248. Its totient is φ = 172999008.

The previous prime is 649950869. The next prime is 649950877. The reversal of 649950870 is 78059946.

It is a super-2 number, since 2×649950870² = 844872266827513800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649950877) 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, 3394 + ... + 36213.

It is an arithmetic number, because the mean of its divisors is an integer number (48836664).

Almost surely, 2^649950870 is an apocalyptic number.

649950870 is an abundant number, since it is smaller than the sum of its proper divisors (912822378).

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

649950870 is a wasteful number, since it uses less digits than its factorization.

649950870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40164.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 649950870 is about 25494.1340311845. The cubic root of 649950870 is about 866.2172800078.

The spelling of 649950870 in words is "six hundred forty-nine million, nine hundred fifty thousand, eight hundred seventy".