308399982 has 64 divisors (see below), whose sum is σ = 711383040. Its totient is φ = 88149600.

The previous prime is 308399981. The next prime is 308399983. The reversal of 308399982 is 289993803.

It is an interprime number because it is at equal distance from previous prime (308399981) and next prime (308399983).

It is a super-2 number, since 2×308399982² = 190221097795200648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308399981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414703 + ... + 415445.

It is an arithmetic number, because the mean of its divisors is an integer number (11115360).

Almost surely, 2^308399982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308399982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355691520).

308399982 is an abundant number, since it is smaller than the sum of its proper divisors (402983058).

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

308399982 is a wasteful number, since it uses less digits than its factorization.

308399982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 308399982 is about 17561.3206223222. The cubic root of 308399982 is about 675.6235532874.

The spelling of 308399982 in words is "three hundred eight million, three hundred ninety-nine thousand, nine hundred eighty-two".