28078302 has 16 divisors (see below), whose sum is σ = 64179072. Its totient is φ = 8022360.

The previous prime is 28078283. The next prime is 28078307. The reversal of 28078302 is 20387082.

It is a self number, because there is not a number n which added to its sum of digits gives 28078302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334224 + ... + 334307.

It is an arithmetic number, because the mean of its divisors is an integer number (4011192).

Almost surely, 2^28078302 is an apocalyptic number.

28078302 is an abundant number, since it is smaller than the sum of its proper divisors (36100770).

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

28078302 is a wasteful number, since it uses less digits than its factorization.

28078302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668543.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28078302 is about 5298.8963001742. The cubic root of 28078302 is about 303.9416944390.

The spelling of 28078302 in words is "twenty-eight million, seventy-eight thousand, three hundred two".