28873740 has 192 divisors, whose sum is σ = 99993600. Its totient is φ = 6209280.

The previous prime is 28873729. The next prime is 28873751. The reversal of 28873740 is 4737882.

It is an interprime number because it is at equal distance from previous prime (28873729) and next prime (28873751).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 473310 + ... + 473370.

It is an arithmetic number, because the mean of its divisors is an integer number (520800).

Almost surely, 2^28873740 is an apocalyptic number.

28873740 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 28873740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49996800).

28873740 is an abundant number, since it is smaller than the sum of its proper divisors (71119860).

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

28873740 is a wasteful number, since it uses less digits than its factorization.

28873740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 28873740 is about 5373.4290727616. The cubic root of 28873740 is about 306.7851595237.

The spelling of 28873740 in words is "twenty-eight million, eight hundred seventy-three thousand, seven hundred forty".