28739998 has 8 divisors (see below), whose sum is σ = 49268592. Its totient is φ = 12317136.

The previous prime is 28739941. The next prime is 28739999. The reversal of 28739998 is 89993782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28739999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026415 + ... + 1026442.

It is an arithmetic number, because the mean of its divisors is an integer number (6158574).

Almost surely, 2^28739998 is an apocalyptic number.

28739998 is a deficient number, since it is larger than the sum of its proper divisors (20528594).

28739998 is a wasteful number, since it uses less digits than its factorization.

28739998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052866.

The product of its digits is 1959552, while the sum is 55.

The square root of 28739998 is about 5360.9698749387. The cubic root of 28739998 is about 306.3107541275.

The spelling of 28739998 in words is "twenty-eight million, seven hundred thirty-nine thousand, nine hundred ninety-eight".