28881032 has 8 divisors (see below), whose sum is σ = 54151950. Its totient is φ = 14440512.

The previous prime is 28881001. The next prime is 28881037. The reversal of 28881032 is 23018882.

It can be written as a sum of positive squares in only one way, i.e., 28879876 + 1156 = 5374^2 + 34^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28881032² = 1668228018770048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28881032.

It is not an unprimeable number, because it can be changed into a prime (28881037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1805057 + ... + 1805072.

Almost surely, 2^28881032 is an apocalyptic number.

It is an amenable number.

28881032 is a deficient number, since it is larger than the sum of its proper divisors (25270918).

28881032 is a wasteful number, since it uses less digits than its factorization.

28881032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610135 (or 3610131 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 28881032 is about 5374.1075538177. The cubic root of 28881032 is about 306.8109833240.

The spelling of 28881032 in words is "twenty-eight million, eight hundred eighty-one thousand, thirty-two".