308213742 has 16 divisors (see below), whose sum is σ = 617484672. Its totient is φ = 102561720.

The previous prime is 308213713. The next prime is 308213743. The reversal of 308213742 is 247312803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308213743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40234 + ... + 47277.

It is an arithmetic number, because the mean of its divisors is an integer number (38592792).

Almost surely, 2^308213742 is an apocalyptic number.

308213742 is an abundant number, since it is smaller than the sum of its proper divisors (309270930).

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

308213742 is a wasteful number, since it uses less digits than its factorization.

308213742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88103.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 308213742 is about 17556.0172590482. The cubic root of 308213742 is about 675.4875248878.

The spelling of 308213742 in words is "three hundred eight million, two hundred thirteen thousand, seven hundred forty-two".