30139790 has 16 divisors (see below), whose sum is σ = 54906768. Its totient is φ = 11910336.

The previous prime is 30139777. The next prime is 30139799. The reversal of 30139790 is 9793103.

It is a happy number.

It is a super-3 number, since 3×30139790³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30139799) 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, 17327 + ... + 18986.

It is an arithmetic number, because the mean of its divisors is an integer number (3431673).

Almost surely, 2^30139790 is an apocalyptic number.

30139790 is a deficient number, since it is larger than the sum of its proper divisors (24766978).

30139790 is a wasteful number, since it uses less digits than its factorization.

30139790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36403.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 30139790 is about 5489.9717667762. The cubic root of 30139790 is about 311.2051251681.

The spelling of 30139790 in words is "thirty million, one hundred thirty-nine thousand, seven hundred ninety".