28201690672 has 80 divisors (see below), whose sum is σ = 58765613760. Its totient is φ = 13076591616.

The previous prime is 28201690619. The next prime is 28201690717. The reversal of 28201690672 is 27609610282.

It is a super-3 number, since 3×28201690672³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3985954 + ... + 3993022.

It is an arithmetic number, because the mean of its divisors is an integer number (734570172).

Almost surely, 2^28201690672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28201690672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29382806880).

28201690672 is an abundant number, since it is smaller than the sum of its proper divisors (30563923088).

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

28201690672 is a wasteful number, since it uses less digits than its factorization.

28201690672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7430 (or 7424 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 28201690672 in words is "twenty-eight billion, two hundred one million, six hundred ninety thousand, six hundred seventy-two".