28501669 has 16 divisors (see below), whose sum is σ = 34191360. Its totient is φ = 23229360.

The previous prime is 28501667. The next prime is 28501709. The reversal of 28501669 is 96610582.

It is not a de Polignac number, because 28501669 - 2¹ = 28501667 is a prime.

It is a super-2 number, since 2×28501669² = 1624690271571122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28501663) 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, 33552 + ... + 34390.

It is an arithmetic number, because the mean of its divisors is an integer number (2136960).

Almost surely, 2^28501669 is an apocalyptic number.

It is an amenable number.

28501669 is a deficient number, since it is larger than the sum of its proper divisors (5689691).

28501669 is a wasteful number, since it uses less digits than its factorization.

28501669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 28501669 is about 5338.6954398992. The cubic root of 28501669 is about 305.4616997370.

The spelling of 28501669 in words is "twenty-eight million, five hundred one thousand, six hundred sixty-nine".