28318273380 has 96 divisors (see below), whose sum is σ = 90482474880. Its totient is φ = 7347438720.

The previous prime is 28318273351. The next prime is 28318273387. The reversal of 28318273380 is 8337281382.

28318273380 is a `hidden beast` number, since 28 + 3 + 182 + 73 + 380 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (28318273387) 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, 688686 + ... + 728645.

It is an arithmetic number, because the mean of its divisors is an integer number (942525780).

Almost surely, 2^28318273380 is an apocalyptic number.

28318273380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28318273380 is an abundant number, since it is smaller than the sum of its proper divisors (62164201500).

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

28318273380 is a wasteful number, since it uses less digits than its factorization.

28318273380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417386 (or 1417378 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 28318273380 in words is "twenty-eight billion, three hundred eighteen million, two hundred seventy-three thousand, three hundred eighty".