30266640 has 120 divisors (see below), whose sum is σ = 102755328. Its totient is φ = 7983360.

The previous prime is 30266623. The next prime is 30266671. The reversal of 30266640 is 4666203.

It is a tau number, because it is divible by the number of its divisors (120).

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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91275 + ... + 91605.

Almost surely, 2^30266640 is an apocalyptic number.

30266640 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 30266640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51377664).

30266640 is an abundant number, since it is smaller than the sum of its proper divisors (72488688).

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

30266640 is a wasteful number, since it uses less digits than its factorization.

30266640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 30266640 is about 5501.5125192987. The cubic root of 30266640 is about 311.6411060599.

The spelling of 30266640 in words is "thirty million, two hundred sixty-six thousand, six hundred forty".