40145544 has 96 divisors (see below), whose sum is σ = 114397920. Its totient is φ = 13188096.

The previous prime is 40145533. The next prime is 40145549. The reversal of 40145544 is 44554104.

It is a super-2 number, since 2×40145544² = 3223329406111872, 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 (40145549) 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, 207912 + ... + 208104.

It is an arithmetic number, because the mean of its divisors is an integer number (1191645).

Almost surely, 2^40145544 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 40145544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57198960).

40145544 is an abundant number, since it is smaller than the sum of its proper divisors (74252376).

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

40145544 is a wasteful number, since it uses less digits than its factorization.

40145544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 40145544 is about 6336.0511361573. The cubic root of 40145544 is about 342.4094818247.

Adding to 40145544 its reverse (44554104), we get a palindrome (84699648).

The spelling of 40145544 in words is "forty million, one hundred forty-five thousand, five hundred forty-four".