30840999 has 16 divisors (see below), whose sum is σ = 49039872. Its totient is φ = 16856928.

The previous prime is 30840991. The next prime is 30841003. The reversal of 30840999 is 99904803.

It is not a de Polignac number, because 30840999 - 2³ = 30840991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30840999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30840991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31444 + ... + 32409.

It is an arithmetic number, because the mean of its divisors is an integer number (3064992).

Almost surely, 2^30840999 is an apocalyptic number.

30840999 is a deficient number, since it is larger than the sum of its proper divisors (18198873).

30840999 is a wasteful number, since it uses less digits than its factorization.

30840999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63886.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 30840999 is about 5553.4672953030. The cubic root of 30840999 is about 313.6000662430.

The spelling of 30840999 in words is "thirty million, eight hundred forty thousand, nine hundred ninety-nine".