30898749 has 12 divisors (see below), whose sum is σ = 47122656. Its totient is φ = 17641872.

The previous prime is 30898739. The next prime is 30898759. The reversal of 30898749 is 94789803.

It is an interprime number because it is at equal distance from previous prime (30898739) and next prime (30898759).

It is not a de Polignac number, because 30898749 - 2¹² = 30894653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30898698 and 30898707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30898709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24867 + ... + 26079.

It is an arithmetic number, because the mean of its divisors is an integer number (3926888).

Almost surely, 2^30898749 is an apocalyptic number.

It is an amenable number.

30898749 is a deficient number, since it is larger than the sum of its proper divisors (16223907).

30898749 is an frugal number, since it uses more digits than its factorization.

30898749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 30898749 is about 5558.6643179814. The cubic root of 30898749 is about 313.7956836808.

Multiplying 30898749 by its product of nonzero digits (435456), we get a square (13455045644544 = 3668112²).

The spelling of 30898749 in words is "thirty million, eight hundred ninety-eight thousand, seven hundred forty-nine".