28732620 has 144 divisors (see below), whose sum is σ = 97100640. Its totient is φ = 6322176.

The previous prime is 28732619. The next prime is 28732621. The reversal of 28732620 is 2623782.

It is an interprime number because it is at equal distance from previous prime (28732619) and next prime (28732621).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28732621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85092 + ... + 85428.

It is an arithmetic number, because the mean of its divisors is an integer number (674310).

Almost surely, 2^28732620 is an apocalyptic number.

28732620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28732620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48550320).

28732620 is an abundant number, since it is smaller than the sum of its proper divisors (68368020).

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

28732620 is a wasteful number, since it uses less digits than its factorization.

28732620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28732620 is about 5360.2817090149. The cubic root of 28732620 is about 306.2845403219.

The spelling of 28732620 in words is "twenty-eight million, seven hundred thirty-two thousand, six hundred twenty".