28480438 has 8 divisors (see below), whose sum is σ = 48823632. Its totient is φ = 12205896.

The previous prime is 28480429. The next prime is 28480469. The reversal of 28480438 is 83408482.

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

It is a super-2 number, since 2×28480438² = 1622270697343688, which contains 22 as substring.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 28480397 and 28480406.

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, 1017145 + ... + 1017172.

It is an arithmetic number, because the mean of its divisors is an integer number (6102954).

Almost surely, 2^28480438 is an apocalyptic number.

28480438 is a deficient number, since it is larger than the sum of its proper divisors (20343194).

28480438 is a wasteful number, since it uses less digits than its factorization.

28480438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034326.

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 28480438 is about 5336.7066623527. The cubic root of 28480438 is about 305.3858343750.

The spelling of 28480438 in words is "twenty-eight million, four hundred eighty thousand, four hundred thirty-eight".