28254534 has 64 divisors (see below), whose sum is σ = 73543680. Its totient is φ = 7017120.

The previous prime is 28254517. The next prime is 28254553. The reversal of 28254534 is 43545282.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 28254495 and 28254504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9297 + ... + 11955.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^28254534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28254534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36771840).

28254534 is an abundant number, since it is smaller than the sum of its proper divisors (45289146).

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

28254534 is a wasteful number, since it uses less digits than its factorization.

28254534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705.

The product of its digits is 38400, while the sum is 33.

The square root of 28254534 is about 5315.4994120967. The cubic root of 28254534 is about 304.5762600834.

The spelling of 28254534 in words is "twenty-eight million, two hundred fifty-four thousand, five hundred thirty-four".