28760420 has 72 divisors (see below), whose sum is σ = 66898944. Its totient is φ = 10378368.

The previous prime is 28760411. The next prime is 28760437. The reversal of 28760420 is 2406782.

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, 226397 + ... + 226523.

It is an arithmetic number, because the mean of its divisors is an integer number (929152).

Almost surely, 2^28760420 is an apocalyptic number.

28760420 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 28760420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33449472).

28760420 is an abundant number, since it is smaller than the sum of its proper divisors (38138524).

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

28760420 is a wasteful number, since it uses less digits than its factorization.

28760420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28760420 is about 5362.8742293662. The cubic root of 28760420 is about 306.3832894740.

The spelling of 28760420 in words is "twenty-eight million, seven hundred sixty thousand, four hundred twenty".