308907942 has 64 divisors (see below), whose sum is σ = 736542720. Its totient is φ = 84502656.

The previous prime is 308907883. The next prime is 308907953. The reversal of 308907942 is 249709803.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 308907894 and 308907903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153688 + ... + 155684.

It is an arithmetic number, because the mean of its divisors is an integer number (11508480).

Almost surely, 2^308907942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308907942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368271360).

308907942 is an abundant number, since it is smaller than the sum of its proper divisors (427634778).

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

308907942 is a wasteful number, since it uses less digits than its factorization.

308907942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 308907942 is about 17575.7771378679. Note that the first 3 decimals coincide. The cubic root of 308907942 is about 675.9942855743.

The spelling of 308907942 in words is "three hundred eight million, nine hundred seven thousand, nine hundred forty-two".