28677420 has 36 divisors (see below), whose sum is σ = 86988720. Its totient is φ = 7647264.

The previous prime is 28677353. The next prime is 28677437. The reversal of 28677420 is 2477682.

It is a tau number, because it is divible by the number of its divisors (36).

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

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 11 ways as a sum of consecutive naturals, for example, 79480 + ... + 79839.

Almost surely, 2^28677420 is an apocalyptic number.

28677420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28677420 is an abundant number, since it is smaller than the sum of its proper divisors (58311300).

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

28677420 is a wasteful number, since it uses less digits than its factorization.

28677420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159334 (or 159329 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 28677420 is about 5355.1302505168. The cubic root of 28677420 is about 306.0882739046.

The spelling of 28677420 in words is "twenty-eight million, six hundred seventy-seven thousand, four hundred twenty".