307121636 has 12 divisors (see below), whose sum is σ = 537798828. Its totient is φ = 153464832.

The previous prime is 307121627. The next prime is 307121651. The reversal of 307121636 is 636121703.

It can be written as a sum of positive squares in 2 ways, for example, as 115132900 + 191988736 = 10730^2 + 13856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 307121599 and 307121608.

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, 16541 + ... + 29796.

It is an arithmetic number, because the mean of its divisors is an integer number (44816569).

Almost surely, 2^307121636 is an apocalyptic number.

It is an amenable number.

307121636 is a deficient number, since it is larger than the sum of its proper divisors (230677192).

307121636 is a wasteful number, since it uses less digits than its factorization.

307121636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47998 (or 47996 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 307121636 is about 17524.8861907859. The cubic root of 307121636 is about 674.6887534408.

The spelling of 307121636 in words is "three hundred seven million, one hundred twenty-one thousand, six hundred thirty-six".