28377788 has 12 divisors (see below), whose sum is σ = 49703640. Its totient is φ = 14176752.

The previous prime is 28377787. The next prime is 28377793. The reversal of 28377788 is 88777382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28377787) 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 3 ways as a sum of consecutive naturals, for example, 4070 + ... + 8562.

It is an arithmetic number, because the mean of its divisors is an integer number (4141970).

Almost surely, 2^28377788 is an apocalyptic number.

It is an amenable number.

28377788 is a deficient number, since it is larger than the sum of its proper divisors (21325852).

28377788 is a wasteful number, since it uses less digits than its factorization.

28377788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6076 (or 6074 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 50.

The square root of 28377788 is about 5327.0806263844. The cubic root of 28377788 is about 305.0184992811.

The spelling of 28377788 in words is "twenty-eight million, three hundred seventy-seven thousand, seven hundred eighty-eight".