28713420 has 48 divisors (see below), whose sum is σ = 89332320. Its totient is φ = 7656768.

The previous prime is 28713397. The next prime is 28713431. The reversal of 28713420 is 2431782.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26047 + ... + 27126.

It is an arithmetic number, because the mean of its divisors is an integer number (1861090).

Almost surely, 2^28713420 is an apocalyptic number.

28713420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28713420 is an abundant number, since it is smaller than the sum of its proper divisors (60618900).

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

28713420 is a wasteful number, since it uses less digits than its factorization.

28713420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53191 (or 53183 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28713420 is about 5358.4904590752. The cubic root of 28713420 is about 306.2163022759.

The spelling of 28713420 in words is "twenty-eight million, seven hundred thirteen thousand, four hundred twenty".