307690 has 16 divisors (see below), whose sum is σ = 573480. Its totient is φ = 118720.

The previous prime is 307687. The next prime is 307691. The reversal of 307690 is 96703.

It can be written as a sum of positive squares in 4 ways, for example, as 267289 + 40401 = 517^2 + 201^2 .

It is a super-2 number, since 2×307690² = 189346272200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (307691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241 + ... + 820.

2³⁰⁷⁶⁹⁰ is an apocalyptic number.

307690 is a deficient number, since it is larger than the sum of its proper divisors (265790).

307690 is a wasteful number, since it uses less digits than its factorization.

307690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 307690 is about 554.6981160956. The cubic root of 307690 is about 67.5104693409.

The spelling of 307690 in words is "three hundred seven thousand, six hundred ninety".