306400077 has 20 divisors (see below), whose sum is σ = 460469856. Its totient is φ = 203034600.

The previous prime is 306400067. The next prime is 306400079. The reversal of 306400077 is 770004603.

It is a de Polignac number, because none of the positive numbers 2^k-306400077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 306400077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306400079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2202 + ... + 24852.

Almost surely, 2^306400077 is an apocalyptic number.

It is an amenable number.

306400077 is a deficient number, since it is larger than the sum of its proper divisors (154069779).

306400077 is a wasteful number, since it uses less digits than its factorization.

306400077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22830 (or 22821 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 306400077 is about 17504.2873890941. The cubic root of 306400077 is about 674.1599624142.

The spelling of 306400077 in words is "three hundred six million, four hundred thousand, seventy-seven".