28776342 has 64 divisors (see below), whose sum is σ = 71414784. Its totient is φ = 7541760.

The previous prime is 28776329. The next prime is 28776347. The reversal of 28776342 is 24367782.

It is a self number, because there is not a number n which added to its sum of digits gives 28776342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28783 + ... + 29765.

It is an arithmetic number, because the mean of its divisors is an integer number (1115856).

Almost surely, 2^28776342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28776342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35707392).

28776342 is an abundant number, since it is smaller than the sum of its proper divisors (42638442).

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

28776342 is a wasteful number, since it uses less digits than its factorization.

28776342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053.

The product of its digits is 112896, while the sum is 39.

The square root of 28776342 is about 5364.3584891392. The cubic root of 28776342 is about 306.4398177954.

The spelling of 28776342 in words is "twenty-eight million, seven hundred seventy-six thousand, three hundred forty-two".