306778030 has 16 divisors (see below), whose sum is σ = 594677664. Its totient is φ = 113271840.

The previous prime is 306778019. The next prime is 306778033. The reversal of 306778030 is 30877603.

It is a super-2 number, since 2×306778030² = 188225519381361800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306778033) 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, 1179786 + ... + 1180045.

It is an arithmetic number, because the mean of its divisors is an integer number (37167354).

Almost surely, 2^306778030 is an apocalyptic number.

306778030 is a deficient number, since it is larger than the sum of its proper divisors (287899634).

306778030 is a wasteful number, since it uses less digits than its factorization.

306778030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359851.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 306778030 is about 17515.0800740391. The cubic root of 306778030 is about 674.4370468573.

The spelling of 306778030 in words is "three hundred six million, seven hundred seventy-eight thousand, thirty".