28197760036 has 6 divisors (see below), whose sum is σ = 49346080070. Its totient is φ = 14098880016.

The previous prime is 28197760013. The next prime is 28197760049. The reversal of 28197760036 is 63006779182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26266684900 + 1931075136 = 162070^2 + 43944^2 .

It is a super-2 number, since 2×28197760036² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3524720001 + ... + 3524720008.

Almost surely, 2^28197760036 is an apocalyptic number.

It is an amenable number.

28197760036 is a deficient number, since it is larger than the sum of its proper divisors (21148320034).

28197760036 is a wasteful number, since it uses less digits than its factorization.

28197760036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7049440013 (or 7049440011 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 28197760036 in words is "twenty-eight billion, one hundred ninety-seven million, seven hundred sixty thousand, thirty-six".