45138938 has 16 divisors (see below), whose sum is σ = 73370976. Its totient is φ = 20703600.

The previous prime is 45138937. The next prime is 45138943. The reversal of 45138938 is 83983154.

It is a junction number, because it is equal to n+sod(n) for n = 45138895 and 45138904.

It is not an unprimeable number, because it can be changed into a prime (45138937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088 + ... + 9563.

It is an arithmetic number, because the mean of its divisors is an integer number (4585686).

Almost surely, 2^45138938 is an apocalyptic number.

45138938 is a deficient number, since it is larger than the sum of its proper divisors (28232038).

45138938 is a wasteful number, since it uses less digits than its factorization.

45138938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10829.

The product of its digits is 103680, while the sum is 41.

The square root of 45138938 is about 6718.5517784713. The cubic root of 45138938 is about 356.0550192707.

The spelling of 45138938 in words is "forty-five million, one hundred thirty-eight thousand, nine hundred thirty-eight".