30139038 has 12 divisors (see below), whose sum is σ = 65301288. Its totient is φ = 10046340.

The previous prime is 30139019. The next prime is 30139051. The reversal of 30139038 is 83093103.

It is a super-2 number, since 2×30139038² = 1816723223130888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 837178 + ... + 837213.

It is an arithmetic number, because the mean of its divisors is an integer number (5441774).

Almost surely, 2^30139038 is an apocalyptic number.

30139038 is an abundant number, since it is smaller than the sum of its proper divisors (35162250).

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

30139038 is a wasteful number, since it uses less digits than its factorization.

30139038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674399 (or 1674396 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 30139038 is about 5489.9032778365. The cubic root of 30139038 is about 311.2025369151.

The spelling of 30139038 in words is "thirty million, one hundred thirty-nine thousand, thirty-eight".