28477480 has 16 divisors (see below), whose sum is σ = 64074420. Its totient is φ = 11390976.

The previous prime is 28477459. The next prime is 28477487. The reversal of 28477480 is 8477482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23251684 + 5225796 = 4822^2 + 2286^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 711937 = 28477480 / (2 + 8 + 4 + 7 + 7 + 4 + 8 + 0).

It is not an unprimeable number, because it can be changed into a prime (28477487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355929 + ... + 356008.

Almost surely, 2^28477480 is an apocalyptic number.

28477480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28477480 is an abundant number, since it is smaller than the sum of its proper divisors (35596940).

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

28477480 is a wasteful number, since it uses less digits than its factorization.

28477480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711948 (or 711944 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 28477480 is about 5336.4295179455. The cubic root of 28477480 is about 305.3752614737.

The spelling of 28477480 in words is "twenty-eight million, four hundred seventy-seven thousand, four hundred eighty".