28445542 has 4 divisors (see below), whose sum is σ = 42668316. Its totient is φ = 14222770.

The previous prime is 28445537. The next prime is 28445623. The reversal of 28445542 is 24554482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24554482 = 2 ⋅12277241.

It is a junction number, because it is equal to n+sod(n) for n = 28445498 and 28445507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7111384 + ... + 7111387.

It is an arithmetic number, because the mean of its divisors is an integer number (10667079).

Almost surely, 2^28445542 is an apocalyptic number.

28445542 is a deficient number, since it is larger than the sum of its proper divisors (14222774).

28445542 is a wasteful number, since it uses less digits than its factorization.

28445542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14222773.

The product of its digits is 51200, while the sum is 34.

The square root of 28445542 is about 5333.4362281741. The cubic root of 28445542 is about 305.2610575079.

The spelling of 28445542 in words is "twenty-eight million, four hundred forty-five thousand, five hundred forty-two".