8172028 has 6 divisors (see below), whose sum is σ = 14301056. Its totient is φ = 4086012.

The previous prime is 8172023. The next prime is 8172037. The reversal of 8172028 is 8202718.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8171987 and 8172005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8172023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021500 + ... + 1021507.

Almost surely, 2^8172028 is an apocalyptic number.

It is an amenable number.

8172028 is a deficient number, since it is larger than the sum of its proper divisors (6129028).

8172028 is a wasteful number, since it uses less digits than its factorization.

8172028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043011 (or 2043009 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 8172028 is about 2858.6759172736. The cubic root of 8172028 is about 201.4234121232.

The spelling of 8172028 in words is "eight million, one hundred seventy-two thousand, twenty-eight".