28815042 has 16 divisors (see below), whose sum is σ = 58856832. Its totient is φ = 9400560.

The previous prime is 28815029. The next prime is 28815043. The reversal of 28815042 is 24051882.

It is not an unprimeable number, because it can be changed into a prime (28815043) 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, 50809 + ... + 51372.

It is an arithmetic number, because the mean of its divisors is an integer number (3678552).

Almost surely, 2^28815042 is an apocalyptic number.

28815042 is an abundant number, since it is smaller than the sum of its proper divisors (30041790).

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

28815042 is a wasteful number, since it uses less digits than its factorization.

28815042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102233.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 28815042 is about 5367.9644186600. The cubic root of 28815042 is about 306.5771286068.

It can be divided in two parts, 288 and 15042, that multiplied together give a triangular number (4332096 = T₂₉₄₃).

The spelling of 28815042 in words is "twenty-eight million, eight hundred fifteen thousand, forty-two".