28725480 has 96 divisors (see below), whose sum is σ = 106704000. Its totient is φ = 6565248.

The previous prime is 28725479. The next prime is 28725481. The reversal of 28725480 is 8452782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28725479) and next prime (28725481).

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

It is not an unprimeable number, because it can be changed into a prime (28725481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3180 + ... + 8219.

It is an arithmetic number, because the mean of its divisors is an integer number (1111500).

Almost surely, 2^28725480 is an apocalyptic number.

28725480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28725480 is an abundant number, since it is smaller than the sum of its proper divisors (77978520).

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

28725480 is a wasteful number, since it uses less digits than its factorization.

28725480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11423 (or 11416 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28725480 is about 5359.6156578620. The cubic root of 28725480 is about 306.2591678499.

The spelling of 28725480 in words is "twenty-eight million, seven hundred twenty-five thousand, four hundred eighty".