28199429772 has 24 divisors (see below), whose sum is σ = 68659481856. Its totient is φ = 8991122448.

The previous prime is 28199429767. The next prime is 28199429773. The reversal of 28199429772 is 27792499182.

It is not an unprimeable number, because it can be changed into a prime (28199429773) 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, 51085648 + ... + 51086199.

It is an arithmetic number, because the mean of its divisors is an integer number (2860811744).

Almost surely, 2^28199429772 is an apocalyptic number.

It is an amenable number.

28199429772 is an abundant number, since it is smaller than the sum of its proper divisors (40460052084).

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

28199429772 is a wasteful number, since it uses less digits than its factorization.

28199429772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102171877 (or 102171875 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 60.

The spelling of 28199429772 in words is "twenty-eight billion, one hundred ninety-nine million, four hundred twenty-nine thousand, seven hundred seventy-two".