28700738 has 32 divisors (see below), whose sum is σ = 49206528. Its totient is φ = 12438400.

The previous prime is 28700731. The next prime is 28700741. The reversal of 28700738 is 83700782.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28700698 and 28700707.

It is not an unprimeable number, because it can be changed into a prime (28700731) 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, 42056 + ... + 42732.

It is an arithmetic number, because the mean of its divisors is an integer number (1537704).

Almost surely, 2^28700738 is an apocalyptic number.

28700738 is a deficient number, since it is larger than the sum of its proper divisors (20505790).

28700738 is a wasteful number, since it uses less digits than its factorization.

28700738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 28700738 is about 5357.3069727243. The cubic root of 28700738 is about 306.1712129411.

The spelling of 28700738 in words is "twenty-eight million, seven hundred thousand, seven hundred thirty-eight".