28376920 has 128 divisors (see below), whose sum is σ = 77474880. Its totient is φ = 9292800.

The previous prime is 28376897. The next prime is 28376921. The reversal of 28376920 is 2967382.

It is a self number, because there is not a number n which added to its sum of digits gives 28376920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28376921) 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, 692100 + ... + 692140.

Almost surely, 2^28376920 is an apocalyptic number.

28376920 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 28376920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38737440).

28376920 is an abundant number, since it is smaller than the sum of its proper divisors (49097960).

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

28376920 is a wasteful number, since it uses less digits than its factorization.

28376920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 28376920 is about 5326.9991552468. Note that the first 3 decimals coincide. The cubic root of 28376920 is about 305.0153893516.

The spelling of 28376920 in words is "twenty-eight million, three hundred seventy-six thousand, nine hundred twenty".