28377771 has 8 divisors (see below), whose sum is σ = 37862400. Its totient is φ = 18905832.

The previous prime is 28377757. The next prime is 28377787. The reversal of 28377771 is 17777382.

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

It is not a de Polignac number, because 28377771 - 2¹⁴ = 28361387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28377731) 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, 5226 + ... + 9168.

It is an arithmetic number, because the mean of its divisors is an integer number (4732800).

Almost surely, 2^28377771 is an apocalyptic number.

28377771 is a deficient number, since it is larger than the sum of its proper divisors (9484629).

28377771 is a wasteful number, since it uses less digits than its factorization.

28377771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6345.

The product of its digits is 115248, while the sum is 42.

The square root of 28377771 is about 5327.0790307635. The cubic root of 28377771 is about 305.0184383729.

The spelling of 28377771 in words is "twenty-eight million, three hundred seventy-seven thousand, seven hundred seventy-one".