308989994 has 8 divisors (see below), whose sum is σ = 490748868. Its totient is φ = 145407040.

The previous prime is 308989963. The next prime is 308990023. The reversal of 308989994 is 499989803.

It can be written as a sum of positive squares in 2 ways, for example, as 302307769 + 6682225 = 17387^2 + 2585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 4543937 + ... + 4544004.

Almost surely, 2^308989994 is an apocalyptic number.

308989994 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

308989994 is a deficient number, since it is larger than the sum of its proper divisors (181758874).

308989994 is a wasteful number, since it uses less digits than its factorization.

308989994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9087960.

The product of its (nonzero) digits is 5038848, while the sum is 59.

The square root of 308989994 is about 17578.1112182168. Note that the first 3 decimals coincide. The cubic root of 308989994 is about 676.0541327167.

The spelling of 308989994 in words is "three hundred eight million, nine hundred eighty-nine thousand, nine hundred ninety-four".