305857069 has 12 divisors (see below), whose sum is σ = 356457024. Its totient is φ = 261673944.

The previous prime is 305857033. The next prime is 305857073. The reversal of 305857069 is 960758503.

It is not a de Polignac number, because 305857069 - 2¹⁵ = 305824301 is a prime.

It is a super-2 number, since 2×305857069² = 187097093314541522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305857369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22044 + ... + 33130.

It is an arithmetic number, because the mean of its divisors is an integer number (29704752).

Almost surely, 2^305857069 is an apocalyptic number.

It is an amenable number.

305857069 is a deficient number, since it is larger than the sum of its proper divisors (50599955).

305857069 is a wasteful number, since it uses less digits than its factorization.

305857069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11664 (or 11657 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 305857069 is about 17488.7697966438. The cubic root of 305857069 is about 673.7614739149.

The spelling of 305857069 in words is "three hundred five million, eight hundred fifty-seven thousand, sixty-nine".