28861934 has 4 divisors (see below), whose sum is σ = 43292904. Its totient is φ = 14430966.

The previous prime is 28861933. The next prime is 28861949. The reversal of 28861934 is 43916882.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28861934² = 1666022468440712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28861891 and 28861900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28861933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7215482 + ... + 7215485.

It is an arithmetic number, because the mean of its divisors is an integer number (10823226).

Almost surely, 2^28861934 is an apocalyptic number.

28861934 is a deficient number, since it is larger than the sum of its proper divisors (14430970).

28861934 is a wasteful number, since it uses less digits than its factorization.

28861934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14430969.

The product of its digits is 82944, while the sum is 41.

The square root of 28861934 is about 5372.3304068160. The cubic root of 28861934 is about 306.7433406789.

The spelling of 28861934 in words is "twenty-eight million, eight hundred sixty-one thousand, nine hundred thirty-four".