28742088 has 32 divisors (see below), whose sum is σ = 74980800. Its totient is φ = 9163968.

The previous prime is 28742083. The next prime is 28742093. The reversal of 28742088 is 88024782.

It is an interprime number because it is at equal distance from previous prime (28742083) and next prime (28742093).

It is a super-2 number, since 2×28742088² = 1652215245199488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28742083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25483 + ... + 26586.

It is an arithmetic number, because the mean of its divisors is an integer number (2343150).

Almost surely, 2^28742088 is an apocalyptic number.

It is an amenable number.

28742088 is an abundant number, since it is smaller than the sum of its proper divisors (46238712).

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

28742088 is a wasteful number, since it uses less digits than its factorization.

28742088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52101 (or 52097 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 28742088 is about 5361.1647988100. The cubic root of 28742088 is about 306.3181790174.

The spelling of 28742088 in words is "twenty-eight million, seven hundred forty-two thousand, eighty-eight".