28499742 has 32 divisors (see below), whose sum is σ = 63516960. Its totient is φ = 9472320.

The previous prime is 28499741. The next prime is 28499747. The reversal of 28499742 is 24799482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28499741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27628 + ... + 28640.

It is an arithmetic number, because the mean of its divisors is an integer number (1984905).

Almost surely, 2^28499742 is an apocalyptic number.

28499742 is an abundant number, since it is smaller than the sum of its proper divisors (35017218).

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

28499742 is a wasteful number, since it uses less digits than its factorization.

28499742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545 (or 1539 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28499742 is about 5338.5149620470. The cubic root of 28499742 is about 305.4548154856.

It can be divided in two parts, 28499 and 742, that added together give a square (29241 = 171²).

The spelling of 28499742 in words is "twenty-eight million, four hundred ninety-nine thousand, seven hundred forty-two".