28533378 has 32 divisors (see below), whose sum is σ = 61205760. Its totient is φ = 8835840.

The previous prime is 28533367. The next prime is 28533389. The reversal of 28533378 is 87333582.

It is an interprime number because it is at equal distance from previous prime (28533367) and next prime (28533389).

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 15 ways as a sum of consecutive naturals, for example, 6288 + ... + 9828.

It is an arithmetic number, because the mean of its divisors is an integer number (1912680).

Almost surely, 2^28533378 is an apocalyptic number.

28533378 is an abundant number, since it is smaller than the sum of its proper divisors (32672382).

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

28533378 is a wasteful number, since it uses less digits than its factorization.

28533378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642.

The product of its digits is 120960, while the sum is 39.

The square root of 28533378 is about 5341.6643473734. The cubic root of 28533378 is about 305.5749363256.

The spelling of 28533378 in words is "twenty-eight million, five hundred thirty-three thousand, three hundred seventy-eight".