28426042 has 4 divisors (see below), whose sum is σ = 42639066. Its totient is φ = 14213020.

The previous prime is 28426009. The next prime is 28426049. The reversal of 28426042 is 24062482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14295961 + 14130081 = 3781^2 + 3759^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28426042.

It is not an unprimeable number, because it can be changed into a prime (28426049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7106509 + ... + 7106512.

Almost surely, 2^28426042 is an apocalyptic number.

28426042 is a deficient number, since it is larger than the sum of its proper divisors (14213024).

28426042 is a wasteful number, since it uses less digits than its factorization.

28426042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14213023.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 28426042 is about 5331.6078250374. The cubic root of 28426042 is about 305.1912873327.

The spelling of 28426042 in words is "twenty-eight million, four hundred twenty-six thousand, forty-two".