28861064 has 8 divisors (see below), whose sum is σ = 54114510. Its totient is φ = 14430528.

The previous prime is 28861051. The next prime is 28861103. The reversal of 28861064 is 46016882.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 2748964 = 5110^2 + 1658^2 .

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

It is a super-2 number, since 2×28861064² = 1665922030424192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1803809 + ... + 1803824.

Almost surely, 2^28861064 is an apocalyptic number.

It is an amenable number.

28861064 is a deficient number, since it is larger than the sum of its proper divisors (25253446).

28861064 is a wasteful number, since it uses less digits than its factorization.

28861064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607639 (or 3607635 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28861064 is about 5372.2494357578. The cubic root of 28861064 is about 306.7402585410.

The spelling of 28861064 in words is "twenty-eight million, eight hundred sixty-one thousand, sixty-four".