45278638 has 4 divisors (see below), whose sum is σ = 67917960. Its totient is φ = 22639318.

The previous prime is 45278627. The next prime is 45278641. The reversal of 45278638 is 83687254.

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

It is a junction number, because it is equal to n+sod(n) for n = 45278594 and 45278603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11319658 + ... + 11319661.

It is an arithmetic number, because the mean of its divisors is an integer number (16979490).

Almost surely, 2^45278638 is an apocalyptic number.

45278638 is a deficient number, since it is larger than the sum of its proper divisors (22639322).

45278638 is a wasteful number, since it uses less digits than its factorization.

45278638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22639321.

The product of its digits is 322560, while the sum is 43.

The square root of 45278638 is about 6728.9403326230. The cubic root of 45278638 is about 356.4219578996.

The spelling of 45278638 in words is "forty-five million, two hundred seventy-eight thousand, six hundred thirty-eight".