28377811 has 48 divisors (see below), whose sum is σ = 40383360. Its totient is φ = 19595520.

The previous prime is 28377799. The next prime is 28377829. The reversal of 28377811 is 11877382.

It is not a de Polignac number, because 28377811 - 2¹⁹ = 27853523 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (18816) is a multiple of the sum of its prime factors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28377851) 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 47 ways as a sum of consecutive naturals, for example, 174016 + ... + 174178.

It is an arithmetic number, because the mean of its divisors is an integer number (841320).

Almost surely, 2^28377811 is an apocalyptic number.

28377811 is a deficient number, since it is larger than the sum of its proper divisors (12005549).

28377811 is a wasteful number, since it uses less digits than its factorization.

28377811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 217 counting only the distinct ones).

The product of its digits is 18816, while the sum is 37.

The square root of 28377811 is about 5327.0827851649. The cubic root of 28377811 is about 305.0185816862.

It can be divided in two parts, 2837 and 7811, that added together give a cube (10648 = 22³).

The spelling of 28377811 in words is "twenty-eight million, three hundred seventy-seven thousand, eight hundred eleven".