20040288 has 48 divisors (see below), whose sum is σ = 55379520. Its totient is φ = 6327936.

The previous prime is 20040259. The next prime is 20040289. The reversal of 20040288 is 88204002.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×20040288² = 803226286245888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040289) 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, 3670 + ... + 7317.

It is an arithmetic number, because the mean of its divisors is an integer number (1153740).

Almost surely, 2^20040288 is an apocalyptic number.

It is an amenable number.

20040288 is an abundant number, since it is smaller than the sum of its proper divisors (35339232).

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

20040288 is a wasteful number, since it uses less digits than its factorization.

20040288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11019 (or 11011 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 20040288 is about 4476.6380242320. The cubic root of 20040288 is about 271.6239035069.

The spelling of 20040288 in words is "twenty million, forty thousand, two hundred eighty-eight".