30140688 has 40 divisors (see below), whose sum is σ = 81964000. Its totient is φ = 9517824.

The previous prime is 30140639. The next prime is 30140731. The reversal of 30140688 is 88604103.

It is a happy number.

It is a super-2 number, since 2×30140688² = 1816922146226688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15613 + ... + 17436.

It is an arithmetic number, because the mean of its divisors is an integer number (2049100).

Almost surely, 2^30140688 is an apocalyptic number.

30140688 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30140688 is an abundant number, since it is smaller than the sum of its proper divisors (51823312).

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

30140688 is a wasteful number, since it uses less digits than its factorization.

30140688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33079 (or 33073 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 30140688 is about 5490.0535516514. The cubic root of 30140688 is about 311.2082158712.

The spelling of 30140688 in words is "thirty million, one hundred forty thousand, six hundred eighty-eight".