30229640 has 64 divisors (see below), whose sum is σ = 78537600. Its totient is φ = 10257408.

The previous prime is 30229631. The next prime is 30229643. The reversal of 30229640 is 4692203.

It is a super-2 number, since 2×30229640² = 1827662269059200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30229643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29456 + ... + 30464.

It is an arithmetic number, because the mean of its divisors is an integer number (1227150).

Almost surely, 2^30229640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30229640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39268800).

30229640 is an abundant number, since it is smaller than the sum of its proper divisors (48307960).

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

30229640 is a wasteful number, since it uses less digits than its factorization.

30229640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 30229640 is about 5498.1487793620. The cubic root of 30229640 is about 311.5140638470.

The spelling of 30229640 in words is "thirty million, two hundred twenty-nine thousand, six hundred forty".