28971480 has 32 divisors (see below), whose sum is σ = 86914800. Its totient is φ = 7725696.

The previous prime is 28971469. The next prime is 28971487. The reversal of 28971480 is 8417982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28971487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120595 + ... + 120834.

Almost surely, 2^28971480 is an apocalyptic number.

28971480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28971480 is an abundant number, since it is smaller than the sum of its proper divisors (57943320).

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

28971480 is a wasteful number, since it uses less digits than its factorization.

28971480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241443 (or 241439 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 28971480 is about 5382.5161402452. The cubic root of 28971480 is about 307.1309340449.

The spelling of 28971480 in words is "twenty-eight million, nine hundred seventy-one thousand, four hundred eighty".