28742108 has 12 divisors (see below), whose sum is σ = 50339352. Its totient is φ = 14359440.

The previous prime is 28742099. The next prime is 28742113. The reversal of 28742108 is 80124782.

It is a super-2 number, since 2×28742108² = 1652217544567328, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 5138 + ... + 9158.

It is an arithmetic number, because the mean of its divisors is an integer number (4194946).

Almost surely, 2^28742108 is an apocalyptic number.

It is an amenable number.

28742108 is a deficient number, since it is larger than the sum of its proper divisors (21597244).

28742108 is a wasteful number, since it uses less digits than its factorization.

28742108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812 (or 5810 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 28742108 is about 5361.1666640760. The cubic root of 28742108 is about 306.3182500672.

The spelling of 28742108 in words is "twenty-eight million, seven hundred forty-two thousand, one hundred eight".