30749142 has 16 divisors (see below), whose sum is σ = 61553520. Its totient is φ = 10240512.

The previous prime is 30749129. The next prime is 30749143. The reversal of 30749142 is 24194703.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30749143) 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, 9978 + ... + 12690.

It is an arithmetic number, because the mean of its divisors is an integer number (3847095).

Almost surely, 2^30749142 is an apocalyptic number.

30749142 is an abundant number, since it is smaller than the sum of its proper divisors (30804378).

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

30749142 is a wasteful number, since it uses less digits than its factorization.

30749142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 30749142 is about 5545.1908894104. The cubic root of 30749142 is about 313.2884139118.

The spelling of 30749142 in words is "thirty million, seven hundred forty-nine thousand, one hundred forty-two".