28619580 has 96 divisors (see below), whose sum is σ = 88478208. Its totient is φ = 6854400.

The previous prime is 28619579. The next prime is 28619581. The reversal of 28619580 is 8591682.

It is an interprime number because it is at equal distance from previous prime (28619579) and next prime (28619581).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28619581) 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, 67770 + ... + 68190.

It is an arithmetic number, because the mean of its divisors is an integer number (921648).

Almost surely, 2^28619580 is an apocalyptic number.

28619580 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 28619580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44239104).

28619580 is an abundant number, since it is smaller than the sum of its proper divisors (59858628).

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

28619580 is a wasteful number, since it uses less digits than its factorization.

28619580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 28619580 is about 5349.7270958433. The cubic root of 28619580 is about 305.8823504322.

The spelling of 28619580 in words is "twenty-eight million, six hundred nineteen thousand, five hundred eighty".