28448742 has 32 divisors (see below), whose sum is σ = 65705472. Its totient is φ = 8043264.

The previous prime is 28448741. The next prime is 28448743. The reversal of 28448742 is 24784482.

It is an interprime number because it is at equal distance from previous prime (28448741) and next prime (28448743).

It is a super-3 number, since 3×28448742³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28448742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28448741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583 + ... + 7565.

It is an arithmetic number, because the mean of its divisors is an integer number (2053296).

Almost surely, 2^28448742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28448742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32852736).

28448742 is an abundant number, since it is smaller than the sum of its proper divisors (37256730).

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

28448742 is a wasteful number, since it uses less digits than its factorization.

28448742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7092.

The product of its digits is 114688, while the sum is 39.

The square root of 28448742 is about 5333.7362139498. The cubic root of 28448742 is about 305.2725039267.

The spelling of 28448742 in words is "twenty-eight million, four hundred forty-eight thousand, seven hundred forty-two".