28409078 has 8 divisors (see below), whose sum is σ = 43035840. Its totient is φ = 14063800.

The previous prime is 28408999. The next prime is 28409089. The reversal of 28409078 is 87090482.

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

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, 70118 + ... + 70521.

It is an arithmetic number, because the mean of its divisors is an integer number (5379480).

Almost surely, 2^28409078 is an apocalyptic number.

28409078 is a deficient number, since it is larger than the sum of its proper divisors (14626762).

28409078 is a wasteful number, since it uses less digits than its factorization.

28409078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140742.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28409078 is about 5330.0166979101. The cubic root of 28409078 is about 305.1305649004.

The spelling of 28409078 in words is "twenty-eight million, four hundred nine thousand, seventy-eight".