28478302 has 8 divisors (see below), whose sum is σ = 44965800. Its totient is φ = 13489704.

The previous prime is 28478279. The next prime is 28478311. The reversal of 28478302 is 20387482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28478302² = 1622027369606408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374677 + ... + 374752.

It is an arithmetic number, because the mean of its divisors is an integer number (5620725).

Almost surely, 2^28478302 is an apocalyptic number.

28478302 is a deficient number, since it is larger than the sum of its proper divisors (16487498).

28478302 is a wasteful number, since it uses less digits than its factorization.

28478302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749450.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28478302 is about 5336.5065351782. The cubic root of 28478302 is about 305.3781996556.

The spelling of 28478302 in words is "twenty-eight million, four hundred seventy-eight thousand, three hundred two".