30189957 has 32 divisors (see below), whose sum is σ = 48211200. Its totient is φ = 16439808.

The previous prime is 30189941. The next prime is 30189959. The reversal of 30189957 is 75998103.

It is a happy number.

It is not a de Polignac number, because 30189957 - 2⁴ = 30189941 is a prime.

It is a super-2 number, since 2×30189957² = 1822867007323698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30189959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53923 + ... + 54479.

It is an arithmetic number, because the mean of its divisors is an integer number (1506600).

Almost surely, 2^30189957 is an apocalyptic number.

It is an amenable number.

30189957 is a deficient number, since it is larger than the sum of its proper divisors (18021243).

30189957 is a wasteful number, since it uses less digits than its factorization.

30189957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 30189957 is about 5494.5388341516. The cubic root of 30189957 is about 311.3776940927.

The spelling of 30189957 in words is "thirty million, one hundred eighty-nine thousand, nine hundred fifty-seven".