30188742 has 32 divisors (see below), whose sum is σ = 63307008. Its totient is φ = 9578976.

The previous prime is 30188737. The next prime is 30188759. The reversal of 30188742 is 24788103.

It is a super-2 number, since 2×30188742² = 1822720287085128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38668 + ... + 39440.

It is an arithmetic number, because the mean of its divisors is an integer number (1978344).

Almost surely, 2^30188742 is an apocalyptic number.

30188742 is an abundant number, since it is smaller than the sum of its proper divisors (33118266).

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

30188742 is a wasteful number, since it uses less digits than its factorization.

30188742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 30188742 is about 5494.4282687100. The cubic root of 30188742 is about 311.3735168871.

The spelling of 30188742 in words is "thirty million, one hundred eighty-eight thousand, seven hundred forty-two".