28690655136 has 192 divisors, whose sum is σ = 88659204480. Its totient is φ = 8009072640.

The previous prime is 28690655131. The next prime is 28690655153. The reversal of 28690655136 is 63155609682.

It is not an unprimeable number, because it can be changed into a prime (28690655131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7809396 + ... + 7813068.

It is an arithmetic number, because the mean of its divisors is an integer number (461766690).

Almost surely, 2^28690655136 is an apocalyptic number.

28690655136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28690655136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44329602240).

28690655136 is an abundant number, since it is smaller than the sum of its proper divisors (59968549344).

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

28690655136 is a wasteful number, since it uses less digits than its factorization.

28690655136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279 (or 4271 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 28690655136 in words is "twenty-eight billion, six hundred ninety million, six hundred fifty-five thousand, one hundred thirty-six".