30140438 has 4 divisors (see below), whose sum is σ = 45210660. Its totient is φ = 15070218.

The previous prime is 30140431. The next prime is 30140449. The reversal of 30140438 is 83404103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83404103 = 431 ⋅193513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30140431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7535108 + ... + 7535111.

It is an arithmetic number, because the mean of its divisors is an integer number (11302665).

Almost surely, 2^30140438 is an apocalyptic number.

30140438 is a deficient number, since it is larger than the sum of its proper divisors (15070222).

30140438 is a wasteful number, since it uses less digits than its factorization.

30140438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15070221.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 30140438 is about 5490.0307831560. The cubic root of 30140438 is about 311.2073554366.

The spelling of 30140438 in words is "thirty million, one hundred forty thousand, four hundred thirty-eight".