28377687 has 8 divisors (see below), whose sum is σ = 40747504. Its totient is φ = 17463168.

The previous prime is 28377677. The next prime is 28377691. The reversal of 28377687 is 78677382.

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

It is not a de Polignac number, because 28377687 - 2²⁰ = 27329111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28377637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363778 + ... + 363855.

It is an arithmetic number, because the mean of its divisors is an integer number (5093438).

Almost surely, 2^28377687 is an apocalyptic number.

28377687 is a deficient number, since it is larger than the sum of its proper divisors (12369817).

28377687 is a wasteful number, since it uses less digits than its factorization.

28377687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727649.

The product of its digits is 790272, while the sum is 48.

The square root of 28377687 is about 5327.0711465119. The cubic root of 28377687 is about 305.0181374146.

The spelling of 28377687 in words is "twenty-eight million, three hundred seventy-seven thousand, six hundred eighty-seven".