28677320 has 128 divisors (see below), whose sum is σ = 79280640. Its totient is φ = 9123840.

The previous prime is 28677307. The next prime is 28677349. The reversal of 28677320 is 2377682.

28677320 = T₉₃₉ + T₉₄₀ + ... + T₉₉₉.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392804 + ... + 392876.

It is an arithmetic number, because the mean of its divisors is an integer number (619380).

Almost surely, 2^28677320 is an apocalyptic number.

28677320 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 28677320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39640320).

28677320 is an abundant number, since it is smaller than the sum of its proper divisors (50603320).

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

28677320 is a wasteful number, since it uses less digits than its factorization.

28677320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 28677320 is about 5355.1209136676. The cubic root of 28677320 is about 306.0879181211.

The spelling of 28677320 in words is "twenty-eight million, six hundred seventy-seven thousand, three hundred twenty".