28475238144 has 144 divisors (see below), whose sum is σ = 76982844960. Its totient is φ = 9342812160.

The previous prime is 28475238091. The next prime is 28475238167. The reversal of 28475238144 is 44183257482.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 28475238093 and 28475238102.

It is a congruent number.

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, 17565654 + ... + 17567274.

It is an arithmetic number, because the mean of its divisors is an integer number (534603090).

Almost surely, 2^28475238144 is an apocalyptic number.

28475238144 is a gapful number since it is divisible by the number (24) 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 28475238144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38491422480).

28475238144 is an abundant number, since it is smaller than the sum of its proper divisors (48507606816).

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

28475238144 is a wasteful number, since it uses less digits than its factorization.

28475238144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 1972 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 48.

The spelling of 28475238144 in words is "twenty-eight billion, four hundred seventy-five million, two hundred thirty-eight thousand, one hundred forty-four".