28879742 has 4 divisors (see below), whose sum is σ = 43319616. Its totient is φ = 14439870.

The previous prime is 28879727. The next prime is 28879759. The reversal of 28879742 is 24797882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24797882 = 2 ⋅12398941.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7219934 + ... + 7219937.

It is an arithmetic number, because the mean of its divisors is an integer number (10829904).

Almost surely, 2^28879742 is an apocalyptic number.

28879742 is a deficient number, since it is larger than the sum of its proper divisors (14439874).

28879742 is a wasteful number, since it uses less digits than its factorization.

28879742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14439873.

The product of its digits is 451584, while the sum is 47.

The square root of 28879742 is about 5373.9875325497. The cubic root of 28879742 is about 306.8064152501.

The spelling of 28879742 in words is "twenty-eight million, eight hundred seventy-nine thousand, seven hundred forty-two".