30139402 has 8 divisors (see below), whose sum is σ = 47868516. Its totient is φ = 14183232.

The previous prime is 30139393. The next prime is 30139427. The reversal of 30139402 is 20493103.

It can be written as a sum of positive squares in 2 ways, for example, as 29909961 + 229441 = 5469^2 + 479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443193 + ... + 443260.

Almost surely, 2^30139402 is an apocalyptic number.

30139402 is a deficient number, since it is larger than the sum of its proper divisors (17729114).

30139402 is a wasteful number, since it uses less digits than its factorization.

30139402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886472.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 30139402 is about 5489.9364295044. The cubic root of 30139402 is about 311.2037897451.

The spelling of 30139402 in words is "thirty million, one hundred thirty-nine thousand, four hundred two".