45438140 has 48 divisors (see below), whose sum is σ = 104648544. Its totient is φ = 16435200.

The previous prime is 45438137. The next prime is 45438167. The reversal of 45438140 is 4183454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52592 + ... + 53448.

It is an arithmetic number, because the mean of its divisors is an integer number (2180178).

Almost surely, 2^45438140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45438140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52324272).

45438140 is an abundant number, since it is smaller than the sum of its proper divisors (59210404).

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

45438140 is a wasteful number, since it uses less digits than its factorization.

45438140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 45438140 is about 6740.7818537615. The cubic root of 45438140 is about 356.8399871899.

The spelling of 45438140 in words is "forty-five million, four hundred thirty-eight thousand, one hundred forty".