28523460 has 96 divisors (see below), whose sum is σ = 92236032. Its totient is φ = 6451200.

The previous prime is 28523431. The next prime is 28523461. The reversal of 28523460 is 6432582.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28523461) 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, 47160 + ... + 47760.

It is an arithmetic number, because the mean of its divisors is an integer number (960792).

Almost surely, 2^28523460 is an apocalyptic number.

28523460 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 28523460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46118016).

28523460 is an abundant number, since it is smaller than the sum of its proper divisors (63712572).

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

28523460 is a wasteful number, since it uses less digits than its factorization.

28523460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28523460 is about 5340.7359043488. The cubic root of 28523460 is about 305.5395269951.

The spelling of 28523460 in words is "twenty-eight million, five hundred twenty-three thousand, four hundred sixty".