28103692320 has 720 divisors, whose sum is σ = 111429077760. Its totient is φ = 6439910400.

The previous prime is 28103692303. The next prime is 28103692327. The reversal of 28103692320 is 2329630182.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28103692327) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 653574219 + ... + 653574261.

It is an arithmetic number, because the mean of its divisors is an integer number (154762608).

Almost surely, 2^28103692320 is an apocalyptic number.

28103692320 is a gapful number since it is divisible by the number (20) 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 28103692320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55714538880).

28103692320 is an abundant number, since it is smaller than the sum of its proper divisors (83325385440).

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

28103692320 is a wasteful number, since it uses less digits than its factorization.

28103692320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 28103692320 in words is "twenty-eight billion, one hundred three million, six hundred ninety-two thousand, three hundred twenty".