306729690 has 16 divisors (see below), whose sum is σ = 736151328. Its totient is φ = 81794576.

The previous prime is 306729677. The next prime is 306729701. The reversal of 306729690 is 96927603.

It is a super-2 number, since 2×306729690² = 188166205454992200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5112132 + ... + 5112191.

It is an arithmetic number, because the mean of its divisors is an integer number (46009458).

Almost surely, 2^306729690 is an apocalyptic number.

306729690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

306729690 is an abundant number, since it is smaller than the sum of its proper divisors (429421638).

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

306729690 is a wasteful number, since it uses less digits than its factorization.

306729690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10224333.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 306729690 is about 17513.7000659484. The cubic root of 306729690 is about 674.4016205922.

The spelling of 306729690 in words is "three hundred six million, seven hundred twenty-nine thousand, six hundred ninety".