28378036 has 24 divisors (see below), whose sum is σ = 50996736. Its totient is φ = 13811040.

The previous prime is 28378003. The next prime is 28378057. The reversal of 28378036 is 63087382.

28378036 = 179² + 180² + ... + 449².

It is a junction number, because it is equal to n+sod(n) for n = 28377986 and 28378004.

It is a congruent number.

It is an unprimeable number.

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, 50670 + ... + 51226.

It is an arithmetic number, because the mean of its divisors is an integer number (2124864).

Almost surely, 2^28378036 is an apocalyptic number.

It is an amenable number.

28378036 is a deficient number, since it is larger than the sum of its proper divisors (22618700).

28378036 is a wasteful number, since it uses less digits than its factorization.

28378036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28378036 is about 5327.1039036234. The cubic root of 28378036 is about 305.0193878207.

The spelling of 28378036 in words is "twenty-eight million, three hundred seventy-eight thousand, thirty-six".