45555444 has 144 divisors (see below), whose sum is σ = 136334016. Its totient is φ = 12672000.

The previous prime is 45555437. The next prime is 45555449. The reversal of 45555444 is 44455554.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 45555399 and 45555408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45555449) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 450994 + ... + 451094.

It is an arithmetic number, because the mean of its divisors is an integer number (946764).

Almost surely, 2^45555444 is an apocalyptic number.

45555444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45555444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68167008).

45555444 is an abundant number, since it is smaller than the sum of its proper divisors (90778572).

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

45555444 is a wasteful number, since it uses less digits than its factorization.

45555444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 201 counting only the distinct ones).

The product of its digits is 160000, while the sum is 36.

The square root of 45555444 is about 6749.4773130962. The cubic root of 45555444 is about 357.1467983717.

It can be divided in two parts, 4555 and 5444, that added together give a palindrome (9999).

The spelling of 45555444 in words is "forty-five million, five hundred fifty-five thousand, four hundred forty-four".