28617770 has 8 divisors (see below), whose sum is σ = 51512004. Its totient is φ = 11447104.

The previous prime is 28617767. The next prime is 28617779. The reversal of 28617770 is 7771682.

It can be written as a sum of positive squares in 2 ways, for example, as 27175369 + 1442401 = 5213^2 + 1201^2 .

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 (28617779) 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, 1430879 + ... + 1430898.

Almost surely, 2^28617770 is an apocalyptic number.

28617770 is a deficient number, since it is larger than the sum of its proper divisors (22894234).

28617770 is a wasteful number, since it uses less digits than its factorization.

28617770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861784.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 28617770 is about 5349.5579256608. The cubic root of 28617770 is about 305.8759019480.

The spelling of 28617770 in words is "twenty-eight million, six hundred seventeen thousand, seven hundred seventy".