28434588 has 72 divisors (see below), whose sum is σ = 82147968. Its totient is φ = 7495488.

The previous prime is 28434551. The next prime is 28434613. The reversal of 28434588 is 88543482.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13195 + ... + 15197.

It is an arithmetic number, because the mean of its divisors is an integer number (1140944).

Almost surely, 2^28434588 is an apocalyptic number.

28434588 is a gapful number since it is divisible by the number (28) 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 28434588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41073984).

28434588 is an abundant number, since it is smaller than the sum of its proper divisors (53713380).

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

28434588 is a wasteful number, since it uses less digits than its factorization.

28434588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043 (or 2028 counting only the distinct ones).

The product of its digits is 245760, while the sum is 42.

The square root of 28434588 is about 5332.4092116041. The cubic root of 28434588 is about 305.2218684856.

The spelling of 28434588 in words is "twenty-eight million, four hundred thirty-four thousand, five hundred eighty-eight".