306577940 has 12 divisors (see below), whose sum is σ = 643813716. Its totient is φ = 122631168.

The previous prime is 306577903. The next prime is 306577961. The reversal of 306577940 is 49775603.

It can be written as a sum of positive squares in 2 ways, for example, as 79352464 + 227225476 = 8908^2 + 15074^2 .

It is a congruent number.

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, 7664429 + ... + 7664468.

It is an arithmetic number, because the mean of its divisors is an integer number (53651143).

Almost surely, 2^306577940 is an apocalyptic number.

It is an amenable number.

306577940 is an abundant number, since it is smaller than the sum of its proper divisors (337235776).

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

306577940 is a wasteful number, since it uses less digits than its factorization.

306577940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15328906 (or 15328904 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 306577940 is about 17509.3672072979. The cubic root of 306577940 is about 674.2903854873.

The spelling of 306577940 in words is "three hundred six million, five hundred seventy-seven thousand, nine hundred forty".