30899421 has 64 divisors (see below), whose sum is σ = 56678400. Its totient is φ = 16236288.

The previous prime is 30899417. The next prime is 30899423. The reversal of 30899421 is 12499803.

It is not a de Polignac number, because 30899421 - 2² = 30899417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30899423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 189486 + ... + 189648.

It is an arithmetic number, because the mean of its divisors is an integer number (885600).

Almost surely, 2^30899421 is an apocalyptic number.

It is an amenable number.

30899421 is a deficient number, since it is larger than the sum of its proper divisors (25778979).

30899421 is a wasteful number, since it uses less digits than its factorization.

30899421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 30899421 is about 5558.7247638285. The cubic root of 30899421 is about 313.7979585213.

The spelling of 30899421 in words is "thirty million, eight hundred ninety-nine thousand, four hundred twenty-one".