20115288 has 48 divisors (see below), whose sum is σ = 54685800. Its totient is φ = 6679680.

The previous prime is 20115287. The next prime is 20115307. The reversal of 20115288 is 88251102.

It is a super-2 number, since 2×20115288² = 809249622645888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35068 + ... + 35636.

Almost surely, 2^20115288 is an apocalyptic number.

It is an amenable number.

20115288 is an abundant number, since it is smaller than the sum of its proper divisors (34570512).

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

20115288 is a wasteful number, since it uses less digits than its factorization.

20115288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 20115288 is about 4485.0070234059. The cubic root of 20115288 is about 271.9623289813.

The spelling of 20115288 in words is "twenty million, one hundred fifteen thousand, two hundred eighty-eight".