40045544 has 96 divisors (see below), whose sum is σ = 98249760. Its totient is φ = 15120000.

The previous prime is 40045517. The next prime is 40045547. The reversal of 40045544 is 44554004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40045547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159419 + ... + 159669.

It is an arithmetic number, because the mean of its divisors is an integer number (1023435).

Almost surely, 2^40045544 is an apocalyptic number.

40045544 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 40045544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49124880).

40045544 is an abundant number, since it is smaller than the sum of its proper divisors (58204216).

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

40045544 is a wasteful number, since it uses less digits than its factorization.

40045544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 40045544 is about 6328.1548653616. The cubic root of 40045544 is about 342.1249386778.

Adding to 40045544 its reverse (44554004), we get a palindrome (84599548).

The spelling of 40045544 in words is "forty million, forty-five thousand, five hundred forty-four".