28408680 has 192 divisors, whose sum is σ = 99740160. Its totient is φ = 6994944.

The previous prime is 28408673. The next prime is 28408691. The reversal of 28408680 is 8680482.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 389124 + ... + 389196.

It is an arithmetic number, because the mean of its divisors is an integer number (519480).

Almost surely, 2^28408680 is an apocalyptic number.

28408680 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 28408680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49870080).

28408680 is an abundant number, since it is smaller than the sum of its proper divisors (71331480).

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

28408680 is a wasteful number, since it uses less digits than its factorization.

28408680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 28408680 is about 5329.9793620614. The cubic root of 28408680 is about 305.1291399741.

The spelling of 28408680 in words is "twenty-eight million, four hundred eight thousand, six hundred eighty".