28719042 has 32 divisors (see below), whose sum is σ = 65387520. Its totient is φ = 8323920.

The previous prime is 28719037. The next prime is 28719059. The reversal of 28719042 is 24091782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 28718994 and 28719012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7942 + ... + 10977.

It is an arithmetic number, because the mean of its divisors is an integer number (2043360).

Almost surely, 2^28719042 is an apocalyptic number.

28719042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28719042 is an abundant number, since it is smaller than the sum of its proper divisors (36668478).

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

28719042 is a wasteful number, since it uses less digits than its factorization.

28719042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18958.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 28719042 is about 5359.0150214382. The cubic root of 28719042 is about 306.2362863775.

The spelling of 28719042 in words is "twenty-eight million, seven hundred nineteen thousand, forty-two".