28787742 has 12 divisors (see below), whose sum is σ = 62373480. Its totient is φ = 9595908.

The previous prime is 28787741. The next prime is 28787761. The reversal of 28787742 is 24778782.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28787741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 799642 + ... + 799677.

It is an arithmetic number, because the mean of its divisors is an integer number (5197790).

Almost surely, 2^28787742 is an apocalyptic number.

28787742 is an abundant number, since it is smaller than the sum of its proper divisors (33585738).

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

28787742 is a wasteful number, since it uses less digits than its factorization.

28787742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599327 (or 1599324 counting only the distinct ones).

The product of its digits is 351232, while the sum is 45.

The square root of 28787742 is about 5365.4209527305. The cubic root of 28787742 is about 306.4802787258.

The spelling of 28787742 in words is "twenty-eight million, seven hundred eighty-seven thousand, seven hundred forty-two".