30086640 has 100 divisors (see below), whose sum is σ = 104517864. Its totient is φ = 8021376.

The previous prime is 30086521. The next prime is 30086657. The reversal of 30086640 is 4668003.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4159 + ... + 8801.

Almost surely, 2^30086640 is an apocalyptic number.

30086640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30086640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52258932).

30086640 is an abundant number, since it is smaller than the sum of its proper divisors (74431224).

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

30086640 is a wasteful number, since it uses less digits than its factorization.

30086640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668 (or 4653 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 30086640 is about 5485.1289866329. The cubic root of 30086640 is about 311.0220860168.

The spelling of 30086640 in words is "thirty million, eighty-six thousand, six hundred forty".