28738998 has 24 divisors (see below), whose sum is σ = 62525736. Its totient is φ = 9540000.

The previous prime is 28738981. The next prime is 28739003. The reversal of 28738998 is 89983782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1338 + ... + 7698.

It is an arithmetic number, because the mean of its divisors is an integer number (2605239).

Almost surely, 2^28738998 is an apocalyptic number.

28738998 is an abundant number, since it is smaller than the sum of its proper divisors (33786738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28738998 is a wasteful number, since it uses less digits than its factorization.

28738998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620 (or 6617 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 28738998 is about 5360.8766074216. The cubic root of 28738998 is about 306.3072014213.

The spelling of 28738998 in words is "twenty-eight million, seven hundred thirty-eight thousand, nine hundred ninety-eight".