30408861 has 24 divisors (see below), whose sum is σ = 48693504. Its totient is φ = 16813440.

The previous prime is 30408853. The next prime is 30408871. The reversal of 30408861 is 16880403.

It is a happy number.

It is not a de Polignac number, because 30408861 - 2³ = 30408853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30408811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1221 + ... + 7893.

It is an arithmetic number, because the mean of its divisors is an integer number (2028896).

Almost surely, 2^30408861 is an apocalyptic number.

30408861 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30408861 is a deficient number, since it is larger than the sum of its proper divisors (18284643).

30408861 is a wasteful number, since it uses less digits than its factorization.

30408861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6721 (or 6714 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 30408861 is about 5514.4229979210. The cubic root of 30408861 is about 312.1284706795.

The spelling of 30408861 in words is "thirty million, four hundred eight thousand, eight hundred sixty-one".