299640388 has 12 divisors (see below), whose sum is σ = 524790252. Its totient is φ = 149700320.

The previous prime is 299640379. The next prime is 299640391. The reversal of 299640388 is 883046992.

It can be written as a sum of positive squares in 2 ways, for example, as 100040004 + 199600384 = 10002^2 + 14128^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24223 + ... + 34438.

It is an arithmetic number, because the mean of its divisors is an integer number (43732521).

Almost surely, 2^299640388 is an apocalyptic number.

It is an amenable number.

299640388 is a deficient number, since it is larger than the sum of its proper divisors (225149864).

299640388 is a wasteful number, since it uses less digits than its factorization.

299640388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59942 (or 59940 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 299640388 is about 17310.1238585979. The cubic root of 299640388 is about 669.1653585524.

The spelling of 299640388 in words is "two hundred ninety-nine million, six hundred forty thousand, three hundred eighty-eight".