307020618 has 20 divisors (see below), whose sum is σ = 687953970. Its totient is φ = 102340152.

The previous prime is 307020607. The next prime is 307020631. The reversal of 307020618 is 816020703.

It can be written as a sum of positive squares in only one way, i.e., 305795169 + 1225449 = 17487^2 + 1107^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 307020591 and 307020600.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 947433 + ... + 947756.

Almost surely, 2^307020618 is an apocalyptic number.

307020618 is an abundant number, since it is smaller than the sum of its proper divisors (380933352).

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

307020618 is a wasteful number, since it uses less digits than its factorization.

307020618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895203 (or 1895194 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 307020618 is about 17522.0038237640. The cubic root of 307020618 is about 674.6147727826.

The spelling of 307020618 in words is "three hundred seven million, twenty thousand, six hundred eighteen".