45378939 has 16 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 29066016.

The previous prime is 45378919. The next prime is 45378941. The reversal of 45378939 is 93987354.

It is not a de Polignac number, because 45378939 - 2¹² = 45374843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45378919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18232 + ... + 20570.

It is an arithmetic number, because the mean of its divisors is an integer number (3931200).

Almost surely, 2^45378939 is an apocalyptic number.

45378939 is a deficient number, since it is larger than the sum of its proper divisors (17520261).

45378939 is a wasteful number, since it uses less digits than its factorization.

45378939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594.

The product of its digits is 816480, while the sum is 48.

The square root of 45378939 is about 6736.3891663116. The cubic root of 45378939 is about 356.6849451527.

The spelling of 45378939 in words is "forty-five million, three hundred seventy-eight thousand, nine hundred thirty-nine".