30540288 has 80 divisors (see below), whose sum is σ = 82985760. Its totient is φ = 9977856.

The previous prime is 30540287. The next prime is 30540299. The reversal of 30540288 is 88204503.

It is a super-2 number, since 2×30540288² = 1865418382245888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30540287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90456 + ... + 90792.

It is an arithmetic number, because the mean of its divisors is an integer number (1037322).

Almost surely, 2^30540288 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 30540288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41492880).

30540288 is an abundant number, since it is smaller than the sum of its proper divisors (52445472).

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

30540288 is an equidigital number, since it uses as much as digits as its factorization.

30540288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 30540288 is about 5526.3268090116. The cubic root of 30540288 is about 312.5774971532.

The spelling of 30540288 in words is "thirty million, five hundred forty thousand, two hundred eighty-eight".