28880738 has 8 divisors (see below), whose sum is σ = 43346988. Its totient is φ = 14431744.

The previous prime is 28880737. The next prime is 28880759. The reversal of 28880738 is 83708882.

It can be written as a sum of positive squares in 2 ways, for example, as 27699169 + 1181569 = 5263^2 + 1087^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28880737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370 + ... + 7722.

Almost surely, 2^28880738 is an apocalyptic number.

28880738 is a deficient number, since it is larger than the sum of its proper divisors (14466250).

28880738 is a wasteful number, since it uses less digits than its factorization.

28880738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628.

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 28880738 is about 5374.0802003692. The cubic root of 28880738 is about 306.8099422400.

The spelling of 28880738 in words is "twenty-eight million, eight hundred eighty thousand, seven hundred thirty-eight".