28380266460 has 288 divisors, whose sum is σ = 109878892032. Its totient is φ = 5987831040.

The previous prime is 28380266419. The next prime is 28380266483. The reversal of 28380266460 is 6466208382.

28380266460 is a `hidden beast` number, since 2 + 8 + 380 + 266 + 4 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 410175 + ... + 474345.

Almost surely, 2^28380266460 is an apocalyptic number.

28380266460 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 28380266460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54939446016).

28380266460 is an abundant number, since it is smaller than the sum of its proper divisors (81498625572).

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

28380266460 is a wasteful number, since it uses less digits than its factorization.

28380266460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64215 (or 64201 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 28380266460 in words is "twenty-eight billion, three hundred eighty million, two hundred sixty-six thousand, four hundred sixty".