28190435052 has 72 divisors (see below), whose sum is σ = 74975597760. Its totient is φ = 8217443520.

The previous prime is 28190435017. The next prime is 28190435057. The reversal of 28190435052 is 25053409182.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 28190435052.

It is not an unprimeable number, because it can be changed into a prime (28190435057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327274 + ... + 404337.

Almost surely, 2^28190435052 is an apocalyptic number.

It is an amenable number.

28190435052 is an abundant number, since it is smaller than the sum of its proper divisors (46785162708).

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

28190435052 is a wasteful number, since it uses less digits than its factorization.

28190435052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731663 (or 731648 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 28190435052 in words is "twenty-eight billion, one hundred ninety million, four hundred thirty-five thousand, fifty-two".