45138380 has 24 divisors (see below), whose sum is σ = 108332448. Its totient is φ = 15475968.

The previous prime is 45138367. The next prime is 45138389. The reversal of 45138380 is 8383154.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (45138389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161069 + ... + 161348.

It is an arithmetic number, because the mean of its divisors is an integer number (4513852).

Almost surely, 2^45138380 is an apocalyptic number.

It is an amenable number.

45138380 is an abundant number, since it is smaller than the sum of its proper divisors (63194068).

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

45138380 is a wasteful number, since it uses less digits than its factorization.

45138380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322433 (or 322431 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 45138380 is about 6718.5102515364. The cubic root of 45138380 is about 356.0535521004.

The spelling of 45138380 in words is "forty-five million, one hundred thirty-eight thousand, three hundred eighty".