305940690 has 48 divisors (see below), whose sum is σ = 867761856. Its totient is φ = 74167200.

The previous prime is 305940689. The next prime is 305940697. The reversal of 305940690 is 96049503.

305940690 is a `hidden beast` number, since 3 + 0 + 594 + 0 + 69 + 0 = 666.

It is a super-2 number, since 2×305940690² = 187199411595352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (305940697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153526 + ... + 155505.

It is an arithmetic number, because the mean of its divisors is an integer number (18078372).

Almost surely, 2^305940690 is an apocalyptic number.

305940690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

305940690 is an abundant number, since it is smaller than the sum of its proper divisors (561821166).

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

305940690 is a wasteful number, since it uses less digits than its factorization.

305940690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309055 (or 309052 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 305940690 is about 17491.1603388683. The cubic root of 305940690 is about 673.8228702121.

The spelling of 305940690 in words is "three hundred five million, nine hundred forty thousand, six hundred ninety".