308642642 has 32 divisors (see below), whose sum is σ = 581454720. Its totient is φ = 119364480.

The previous prime is 308642617. The next prime is 308642647. The reversal of 308642642 is 246246803.

It is not an unprimeable number, because it can be changed into a prime (308642647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13784 + ... + 28412.

It is an arithmetic number, because the mean of its divisors is an integer number (18170460).

Almost surely, 2^308642642 is an apocalyptic number.

308642642 is a deficient number, since it is larger than the sum of its proper divisors (272812078).

308642642 is a wasteful number, since it uses less digits than its factorization.

308642642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14786.

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 308642642 is about 17568.2281975161. The cubic root of 308642642 is about 675.8007083242.

The spelling of 308642642 in words is "three hundred eight million, six hundred forty-two thousand, six hundred forty-two".