307738990 has 64 divisors (see below), whose sum is σ = 618456384. Its totient is φ = 109513728.

The previous prime is 307738987. The next prime is 307739023. The reversal of 307738990 is 99837703.

It is a self number, because there is not a number n which added to its sum of digits gives 307738990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658737 + ... + 659203.

It is an arithmetic number, because the mean of its divisors is an integer number (9663381).

Almost surely, 2^307738990 is an apocalyptic number.

307738990 is an abundant number, since it is smaller than the sum of its proper divisors (310717394).

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

307738990 is a wasteful number, since it uses less digits than its factorization.

307738990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 307738990 is about 17542.4909861741. The cubic root of 307738990 is about 675.1405212701.

The spelling of 307738990 in words is "three hundred seven million, seven hundred thirty-eight thousand, nine hundred ninety".