28747642 has 64 divisors (see below), whose sum is σ = 57335040. Its totient is φ = 10483200.

The previous prime is 28747577. The next prime is 28747651. The reversal of 28747642 is 24674782.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28747595 and 28747604.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183028 + ... + 183184.

It is an arithmetic number, because the mean of its divisors is an integer number (895860).

Almost surely, 2^28747642 is an apocalyptic number.

28747642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28747642 is a deficient number, since it is larger than the sum of its proper divisors (28587398).

28747642 is a wasteful number, since it uses less digits than its factorization.

28747642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its digits is 150528, while the sum is 40.

The square root of 28747642 is about 5361.6827582392. The cubic root of 28747642 is about 306.3379082914.

The spelling of 28747642 in words is "twenty-eight million, seven hundred forty-seven thousand, six hundred forty-two".