28514780 has 48 divisors (see below), whose sum is σ = 72467136. Its totient is φ = 9200640.

The previous prime is 28514777. The next prime is 28514789. The reversal of 28514780 is 8741582.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28514780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28514789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3611 + ... + 8370.

It is an arithmetic number, because the mean of its divisors is an integer number (1509732).

Almost surely, 2^28514780 is an apocalyptic number.

28514780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28514780 is an abundant number, since it is smaller than the sum of its proper divisors (43952356).

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

28514780 is a wasteful number, since it uses less digits than its factorization.

28514780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12014 (or 12012 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 28514780 is about 5339.9232204218. The cubic root of 28514780 is about 305.5085308472.

The spelling of 28514780 in words is "twenty-eight million, five hundred fourteen thousand, seven hundred eighty".