30989740 has 24 divisors (see below), whose sum is σ = 67908960. Its totient is φ = 11856768.

The previous prime is 30989737. The next prime is 30989743. The reversal of 30989740 is 4798903.

It is an interprime number because it is at equal distance from previous prime (30989737) and next prime (30989743).

It is a junction number, because it is equal to n+sod(n) for n = 30989693 and 30989702.

It is not an unprimeable number, because it can be changed into a prime (30989743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33225 + ... + 34144.

It is an arithmetic number, because the mean of its divisors is an integer number (2829540).

Almost surely, 2^30989740 is an apocalyptic number.

It is an amenable number.

30989740 is an abundant number, since it is smaller than the sum of its proper divisors (36919220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30989740 is a wasteful number, since it uses less digits than its factorization.

30989740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67401 (or 67399 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 30989740 is about 5566.8429113816. The cubic root of 30989740 is about 314.1034048930.

The spelling of 30989740 in words is "thirty million, nine hundred eighty-nine thousand, seven hundred forty".