45402444 has 60 divisors (see below), whose sum is σ = 125688024. Its totient is φ = 14242176.

The previous prime is 45402443. The next prime is 45402449. The reversal of 45402444 is 44420454.

It is a happy number.

It is a super-2 number, since 2×45402444² = 4122763842346272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (45402443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1387 + ... + 9629.

Almost surely, 2^45402444 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 45402444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62844012).

45402444 is an abundant number, since it is smaller than the sum of its proper divisors (80285580).

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

45402444 is a wasteful number, since it uses less digits than its factorization.

45402444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8276 (or 8265 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 45402444 is about 6738.1335694686. The cubic root of 45402444 is about 356.7465187424.

Adding to 45402444 its reverse (44420454), we get a palindrome (89822898).

The spelling of 45402444 in words is "forty-five million, four hundred two thousand, four hundred forty-four".