30091072 has 28 divisors (see below), whose sum is σ = 65141856. Its totient is φ = 13677440.

The previous prime is 30091063. The next prime is 30091073. The reversal of 30091072 is 27019003.

It is a super-2 number, since 2×30091072² = 1810945228218368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30091073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20668 + ... + 22075.

Almost surely, 2^30091072 is an apocalyptic number.

30091072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30091072 is an abundant number, since it is smaller than the sum of its proper divisors (35050784).

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

30091072 is a wasteful number, since it uses less digits than its factorization.

30091072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42766 (or 42756 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 30091072 is about 5485.5329731941. The cubic root of 30091072 is about 311.0373572712.

The spelling of 30091072 in words is "thirty million, ninety-one thousand, seventy-two".