307720132 has 6 divisors (see below), whose sum is σ = 538510238. Its totient is φ = 153860064.

The previous prime is 307720121. The next prime is 307720141. The reversal of 307720132 is 231027703.

307720132 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 222785476 + 84934656 = 14926^2 + 9216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 307720097 and 307720106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38465013 + ... + 38465020.

Almost surely, 2^307720132 is an apocalyptic number.

It is an amenable number.

307720132 is a deficient number, since it is larger than the sum of its proper divisors (230790106).

307720132 is a wasteful number, since it uses less digits than its factorization.

307720132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76930037 (or 76930035 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 307720132 is about 17541.9534830075. The cubic root of 307720132 is about 675.1267302974.

Adding to 307720132 its reverse (231027703), we get a palindrome (538747835).

The spelling of 307720132 in words is "three hundred seven million, seven hundred twenty thousand, one hundred thirty-two".