650137890 has 32 divisors (see below), whose sum is σ = 1610666496. Its totient is φ = 167777280.

The previous prime is 650137879. The next prime is 650137897. The reversal of 650137890 is 98731056.

It is not an unprimeable number, because it can be changed into a prime (650137897) 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, 348607 + ... + 350466.

It is an arithmetic number, because the mean of its divisors is an integer number (50333328).

Almost surely, 2^650137890 is an apocalyptic number.

650137890 is an abundant number, since it is smaller than the sum of its proper divisors (960528606).

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

650137890 is a wasteful number, since it uses less digits than its factorization.

650137890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699114.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 650137890 is about 25497.8016699479. The cubic root of 650137890 is about 866.3003552203.

The spelling of 650137890 in words is "six hundred fifty million, one hundred thirty-seven thousand, eight hundred ninety".