30899285 has 16 divisors (see below), whose sum is σ = 39620016. Its totient is φ = 23052288.

The previous prime is 30899273. The next prime is 30899311. The reversal of 30899285 is 58299803.

30899285 = 339² + 340² + ... + 508².

It can be written as a sum of positive squares in 8 ways, for example, as 7921 + 30891364 = 89^2 + 5558^2 .

It is a cyclic number.

It is not a de Polignac number, because 30899285 - 2⁴ = 30899269 is a prime.

It is a super-2 number, since 2×30899285² = 1909531627022450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7997 + ... + 11213.

It is an arithmetic number, because the mean of its divisors is an integer number (2476251).

Almost surely, 2^30899285 is an apocalyptic number.

It is an amenable number.

30899285 is a deficient number, since it is larger than the sum of its proper divisors (8720731).

30899285 is a wasteful number, since it uses less digits than its factorization.

30899285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 30899285 is about 5558.7125307934. The cubic root of 30899285 is about 313.7974981396.

The spelling of 30899285 in words is "thirty million, eight hundred ninety-nine thousand, two hundred eighty-five".