45138438 has 16 divisors (see below), whose sum is σ = 100307760. Its totient is φ = 15046128.

The previous prime is 45138437. The next prime is 45138439. The reversal of 45138438 is 83483154.

It is an interprime number because it is at equal distance from previous prime (45138437) and next prime (45138439).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45138437) 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, 417895 + ... + 418002.

It is an arithmetic number, because the mean of its divisors is an integer number (6269235).

Almost surely, 2^45138438 is an apocalyptic number.

45138438 is an abundant number, since it is smaller than the sum of its proper divisors (55169322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45138438 is a wasteful number, since it uses less digits than its factorization.

45138438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835908 (or 835902 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 45138438 is about 6718.5145679681. The cubic root of 45138438 is about 356.0537046026.

The spelling of 45138438 in words is "forty-five million, one hundred thirty-eight thousand, four hundred thirty-eight".