288900020 has 12 divisors (see below), whose sum is σ = 606690084. Its totient is φ = 115560000.

The previous prime is 288900019. The next prime is 288900043. The reversal of 288900020 is 20009882.

It can be written as a sum of positive squares in 2 ways, for example, as 131698576 + 157201444 = 11476^2 + 12538^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7222481 + ... + 7222520.

It is an arithmetic number, because the mean of its divisors is an integer number (50557507).

Almost surely, 2^288900020 is an apocalyptic number.

288900020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

288900020 is an abundant number, since it is smaller than the sum of its proper divisors (317790064).

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

288900020 is a wasteful number, since it uses less digits than its factorization.

288900020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14445010 (or 14445008 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 288900020 is about 16997.0591573954. The cubic root of 288900020 is about 661.0726512214.

The spelling of 288900020 in words is "two hundred eighty-eight million, nine hundred thousand, twenty".