28423584 has 144 divisors (see below), whose sum is σ = 96550272. Its totient is φ = 7755264.

The previous prime is 28423583. The next prime is 28423613. The reversal of 28423584 is 48532482.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-4 number, since 4×28423584⁴ (a number of 31 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28423583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46062 + ... + 46674.

It is an arithmetic number, because the mean of its divisors is an integer number (670488).

Almost surely, 2^28423584 is an apocalyptic number.

28423584 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 28423584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48275136).

28423584 is an abundant number, since it is smaller than the sum of its proper divisors (68126688).

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

28423584 is a wasteful number, since it uses less digits than its factorization.

28423584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 648 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 28423584 is about 5331.3773079759. The cubic root of 28423584 is about 305.1824904484.

The spelling of 28423584 in words is "twenty-eight million, four hundred twenty-three thousand, five hundred eighty-four".