28746378 has 48 divisors (see below), whose sum is σ = 63999936. Its totient is φ = 9322560.

The previous prime is 28746349. The next prime is 28746379. The reversal of 28746378 is 87364782.

It is a happy number.

28746378 is a `hidden beast` number, since 2 + 8 + 7 + 4 + 637 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (28746379) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172051 + ... + 172217.

It is an arithmetic number, because the mean of its divisors is an integer number (1333332).

Almost surely, 2^28746378 is an apocalyptic number.

28746378 is an abundant number, since it is smaller than the sum of its proper divisors (35253558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28746378 is a wasteful number, since it uses less digits than its factorization.

28746378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 376 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 28746378 is about 5361.5648835018. The cubic root of 28746378 is about 306.3334184531. Note that the first 3 decimals are identical.

It can be divided in two parts, 287 and 46378, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 28746378 in words is "twenty-eight million, seven hundred forty-six thousand, three hundred seventy-eight".