28747620 has 72 divisors (see below), whose sum is σ = 95135040. Its totient is φ = 6968640.

The previous prime is 28747577. The next prime is 28747651. The reversal of 28747620 is 2674782.

28747620 is a `hidden beast` number, since 28 + 7 + 4 + 7 + 620 = 666.

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

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5280 + ... + 9239.

It is an arithmetic number, because the mean of its divisors is an integer number (1321320).

Almost surely, 2^28747620 is an apocalyptic number.

28747620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28747620 is an abundant number, since it is smaller than the sum of its proper divisors (66387420).

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

28747620 is a wasteful number, since it uses less digits than its factorization.

28747620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14545 (or 14540 counting only the distinct ones).

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

The square root of 28747620 is about 5361.6807066441. The cubic root of 28747620 is about 306.3378301466.

It can be divided in two parts, 287476 and 20, that added together give a cube (287496 = 66³).

The spelling of 28747620 in words is "twenty-eight million, seven hundred forty-seven thousand, six hundred twenty".