307849540 has 12 divisors (see below), whose sum is σ = 646484076. Its totient is φ = 123139808.

The previous prime is 307849537. The next prime is 307849601. The reversal of 307849540 is 45948703.

It can be written as a sum of positive squares in 2 ways, for example, as 129413376 + 178436164 = 11376^2 + 13358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 307849493 and 307849502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7696219 + ... + 7696258.

It is an arithmetic number, because the mean of its divisors is an integer number (53873673).

Almost surely, 2^307849540 is an apocalyptic number.

It is an amenable number.

307849540 is an abundant number, since it is smaller than the sum of its proper divisors (338634536).

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

307849540 is a wasteful number, since it uses less digits than its factorization.

307849540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15392486 (or 15392484 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 307849540 is about 17545.6416240615. The cubic root of 307849540 is about 675.2213558426.

The spelling of 307849540 in words is "three hundred seven million, eight hundred forty-nine thousand, five hundred forty".