28377605 has 8 divisors (see below), whose sum is σ = 34366200. Its totient is φ = 22493376.

The previous prime is 28377589. The next prime is 28377637. The reversal of 28377605 is 50677382.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10349089 + 18028516 = 3217^2 + 4246^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28377605 - 2⁴ = 28377589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25490 + ... + 26579.

It is an arithmetic number, because the mean of its divisors is an integer number (4295775).

Almost surely, 2^28377605 is an apocalyptic number.

It is an amenable number.

28377605 is a deficient number, since it is larger than the sum of its proper divisors (5988595).

28377605 is a wasteful number, since it uses less digits than its factorization.

28377605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52183.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 28377605 is about 5327.0634499694. The cubic root of 28377605 is about 305.0178436215.

It can be divided in two parts, 28377 and 605, that added together give a palindrome (28982).

The spelling of 28377605 in words is "twenty-eight million, three hundred seventy-seven thousand, six hundred five".