28469772242 has 16 divisors (see below), whose sum is σ = 43517670552. Its totient is φ = 13963971840.

The previous prime is 28469772241. The next prime is 28469772251. The reversal of 28469772242 is 24227796482.

It can be written as a sum of positive squares in 4 ways, for example, as 26738463361 + 1731308881 = 163519^2 + 41609^2 .

It is a super-2 number, since 2×28469772242² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is not an unprimeable number, because it can be changed into a prime (28469772241) 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, 735968 + ... + 773684.

Almost surely, 2^28469772242 is an apocalyptic number.

28469772242 is a deficient number, since it is larger than the sum of its proper divisors (15047898310).

28469772242 is a wasteful number, since it uses less digits than its factorization.

28469772242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44893.

The product of its digits is 5419008, while the sum is 53.

The spelling of 28469772242 in words is "twenty-eight billion, four hundred sixty-nine million, seven hundred seventy-two thousand, two hundred forty-two".