28778301 has 16 divisors (see below), whose sum is σ = 42750720. Its totient is φ = 19133280.

The previous prime is 28778273. The next prime is 28778329. The reversal of 28778301 is 10387782.

28778301 is a `hidden beast` number, since 287 + 78 + 301 = 666.

It is an interprime number because it is at equal distance from previous prime (28778273) and next prime (28778329).

It is not a de Polignac number, because 28778301 - 2¹⁵ = 28745533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28778381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10401 + ... + 12873.

It is an arithmetic number, because the mean of its divisors is an integer number (2671920).

Almost surely, 2^28778301 is an apocalyptic number.

It is an amenable number.

28778301 is a deficient number, since it is larger than the sum of its proper divisors (13972419).

28778301 is a wasteful number, since it uses less digits than its factorization.

28778301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913 (or 2907 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 28778301 is about 5364.5410800925. The cubic root of 28778301 is about 306.4467714472.

The spelling of 28778301 in words is "twenty-eight million, seven hundred seventy-eight thousand, three hundred one".