45542040 has 64 divisors (see below), whose sum is σ = 137410560. Its totient is φ = 12074880.

The previous prime is 45542009. The next prime is 45542059. The reversal of 45542040 is 4024554.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 45542040.

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, 21927 + ... + 23913.

It is an arithmetic number, because the mean of its divisors is an integer number (2147040).

Almost surely, 2^45542040 is an apocalyptic number.

45542040 is a gapful number since it is divisible by the number (40) 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 45542040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68705280).

45542040 is an abundant number, since it is smaller than the sum of its proper divisors (91868520).

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

45542040 is a wasteful number, since it uses less digits than its factorization.

45542040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2188 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 45542040 is about 6748.4842742649. The cubic root of 45542040 is about 357.1117665888. Note that the first 3 decimals are identical.

Adding to 45542040 its reverse (4024554), we get a palindrome (49566594).

The spelling of 45542040 in words is "forty-five million, five hundred forty-two thousand, forty".