28621480 has 16 divisors (see below), whose sum is σ = 64398420. Its totient is φ = 11448576.

The previous prime is 28621469. The next prime is 28621493. The reversal of 28621480 is 8412682.

It can be written as a sum of positive squares in 2 ways, for example, as 27815076 + 806404 = 5274^2 + 898^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357729 + ... + 357808.

Almost surely, 2^28621480 is an apocalyptic number.

28621480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28621480 is an abundant number, since it is smaller than the sum of its proper divisors (35776940).

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

28621480 is a wasteful number, since it uses less digits than its factorization.

28621480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715548 (or 715544 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28621480 is about 5349.9046720479. The cubic root of 28621480 is about 305.8891192667.

The spelling of 28621480 in words is "twenty-eight million, six hundred twenty-one thousand, four hundred eighty".