45278438 has 4 divisors (see below), whose sum is σ = 67917660. Its totient is φ = 22639218.

The previous prime is 45278423. The next prime is 45278449. The reversal of 45278438 is 83487254.

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 = 45278395 and 45278404.

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, 11319608 + ... + 11319611.

It is an arithmetic number, because the mean of its divisors is an integer number (16979415).

Almost surely, 2^45278438 is an apocalyptic number.

45278438 is a deficient number, since it is larger than the sum of its proper divisors (22639222).

45278438 is a wasteful number, since it uses less digits than its factorization.

45278438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22639221.

The product of its digits is 215040, while the sum is 41.

The square root of 45278438 is about 6728.9254714256. The cubic root of 45278438 is about 356.4214331158.

The spelling of 45278438 in words is "forty-five million, two hundred seventy-eight thousand, four hundred thirty-eight".