45855138 has 64 divisors (see below), whose sum is σ = 110960640. Its totient is φ = 12355200.

The previous prime is 45855079. The next prime is 45855143. The reversal of 45855138 is 83155854.

It is a junction number, because it is equal to n+sod(n) for n = 45855096 and 45855105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52953 + ... + 53811.

It is an arithmetic number, because the mean of its divisors is an integer number (1733760).

Almost surely, 2^45855138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45855138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55480320).

45855138 is an abundant number, since it is smaller than the sum of its proper divisors (65105502).

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

45855138 is a wasteful number, since it uses less digits than its factorization.

45855138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943.

The product of its digits is 96000, while the sum is 39.

The square root of 45855138 is about 6771.6421937371. The cubic root of 45855138 is about 357.9282702227.

The spelling of 45855138 in words is "forty-five million, eight hundred fifty-five thousand, one hundred thirty-eight".