30157844 has 12 divisors (see below), whose sum is σ = 52826004. Its totient is φ = 15064704.

The previous prime is 30157789. The next prime is 30157861. The reversal of 30157844 is 44875103.

It can be written as a sum of positive squares in 2 ways, for example, as 27164944 + 2992900 = 5212^2 + 1730^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30157844.

It is a congruent number.

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, 2282 + ... + 8094.

It is an arithmetic number, because the mean of its divisors is an integer number (4402167).

Almost surely, 2^30157844 is an apocalyptic number.

It is an amenable number.

30157844 is a deficient number, since it is larger than the sum of its proper divisors (22668160).

30157844 is a wasteful number, since it uses less digits than its factorization.

30157844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114 (or 7112 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 30157844 is about 5491.6157913678. The cubic root of 30157844 is about 311.2672509699.

The spelling of 30157844 in words is "thirty million, one hundred fifty-seven thousand, eight hundred forty-four".