28783542 has 16 divisors (see below), whose sum is σ = 58378752. Its totient is φ = 9459240.

The previous prime is 28783541. The next prime is 28783549. The reversal of 28783542 is 24538782.

It is a self number, because there is not a number n which added to its sum of digits gives 28783542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28783541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33358 + ... + 34209.

It is an arithmetic number, because the mean of its divisors is an integer number (3648672).

Almost surely, 2^28783542 is an apocalyptic number.

28783542 is an abundant number, since it is smaller than the sum of its proper divisors (29595210).

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

28783542 is a wasteful number, since it uses less digits than its factorization.

28783542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67643.

The product of its digits is 107520, while the sum is 39.

The square root of 28783542 is about 5365.0295432551. The cubic root of 28783542 is about 306.4653733102.

The spelling of 28783542 in words is "twenty-eight million, seven hundred eighty-three thousand, five hundred forty-two".