308742818 has 16 divisors (see below), whose sum is σ = 488268000. Its totient is φ = 146012832.

The previous prime is 308742817. The next prime is 308742821. The reversal of 308742818 is 818247803.

It is a super-2 number, since 2×308742818² = 190644255333162248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (308742817) 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, 18878 + ... + 31206.

It is an arithmetic number, because the mean of its divisors is an integer number (30516750).

Almost surely, 2^308742818 is an apocalyptic number.

308742818 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

308742818 is a deficient number, since it is larger than the sum of its proper divisors (179525182).

308742818 is a wasteful number, since it uses less digits than its factorization.

308742818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13009.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 308742818 is about 17571.0790220749. The cubic root of 308742818 is about 675.8738151901.

The spelling of 308742818 in words is "three hundred eight million, seven hundred forty-two thousand, eight hundred eighteen".