28761888 has 24 divisors (see below), whose sum is σ = 75500208. Its totient is φ = 9587264.

The previous prime is 28761857. The next prime is 28761919. The reversal of 28761888 is 88816782.

It is an interprime number because it is at equal distance from previous prime (28761857) and next prime (28761919).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149706 + ... + 149897.

It is an arithmetic number, because the mean of its divisors is an integer number (3145842).

Almost surely, 2^28761888 is an apocalyptic number.

It is an amenable number.

28761888 is an abundant number, since it is smaller than the sum of its proper divisors (46738320).

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

28761888 is a wasteful number, since it uses less digits than its factorization.

28761888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299616 (or 299608 counting only the distinct ones).

The product of its digits is 344064, while the sum is 48.

The square root of 28761888 is about 5363.0110945252. The cubic root of 28761888 is about 306.3885022284.

The spelling of 28761888 in words is "twenty-eight million, seven hundred sixty-one thousand, eight hundred eighty-eight".