28455418 has 4 divisors (see below), whose sum is σ = 42683130. Its totient is φ = 14227708.

The previous prime is 28455397. The next prime is 28455421. The reversal of 28455418 is 81455482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28015849 + 439569 = 5293^2 + 663^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7113853 + ... + 7113856.

Almost surely, 2^28455418 is an apocalyptic number.

28455418 is a deficient number, since it is larger than the sum of its proper divisors (14227712).

28455418 is a wasteful number, since it uses less digits than its factorization.

28455418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14227711.

The product of its digits is 51200, while the sum is 37.

The square root of 28455418 is about 5334.3620049637. The cubic root of 28455418 is about 305.2963812548.

The spelling of 28455418 in words is "twenty-eight million, four hundred fifty-five thousand, four hundred eighteen".