28378302 has 16 divisors (see below), whose sum is σ = 57075840. Its totient is φ = 9406232.

The previous prime is 28378291. The next prime is 28378313. The reversal of 28378302 is 20387382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28378291) and next prime (28378313).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12138 + ... + 14285.

It is an arithmetic number, because the mean of its divisors is an integer number (3567240).

Almost surely, 2^28378302 is an apocalyptic number.

28378302 is an abundant number, since it is smaller than the sum of its proper divisors (28697538).

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

28378302 is a wasteful number, since it uses less digits than its factorization.

28378302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26607.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28378302 is about 5327.1288702264. The cubic root of 28378302 is about 305.0203408453.

It can be divided in two parts, 28378 and 302, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 28378302 in words is "twenty-eight million, three hundred seventy-eight thousand, three hundred two".