30743842 has 4 divisors (see below), whose sum is σ = 46115766. Its totient is φ = 15371920.

The previous prime is 30743833. The next prime is 30743849. The reversal of 30743842 is 24834703.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24834703 = 3919 ⋅6337.

It can be written as a sum of positive squares in only one way, i.e., 23726641 + 7017201 = 4871^2 + 2649^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (30743849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7685959 + ... + 7685962.

Almost surely, 2^30743842 is an apocalyptic number.

30743842 is a deficient number, since it is larger than the sum of its proper divisors (15371924).

30743842 is a wasteful number, since it uses less digits than its factorization.

30743842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15371923.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 30743842 is about 5544.7129772424. The cubic root of 30743842 is about 313.2704131493.

The spelling of 30743842 in words is "thirty million, seven hundred forty-three thousand, eight hundred forty-two".