28227344490 has 72 divisors (see below), whose sum is σ = 77457173508. Its totient is φ = 7131110400.

The previous prime is 28227344489. The next prime is 28227344501. The reversal of 28227344490 is 9444372282.

It is a happy number.

28227344490 is a `hidden beast` number, since 282 + 27 + 344 + 4 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26892392121 + 1334952369 = 163989^2 + 36537^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 401911 + ... + 466890.

Almost surely, 2^28227344490 is an apocalyptic number.

28227344490 is an abundant number, since it is smaller than the sum of its proper divisors (49229829018).

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

28227344490 is a wasteful number, since it uses less digits than its factorization.

28227344490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868852 (or 868830 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 28227344490 in words is "twenty-eight billion, two hundred twenty-seven million, three hundred forty-four thousand, four hundred ninety".