40144455 has 48 divisors (see below), whose sum is σ = 75575136. Its totient is φ = 19595520.

The previous prime is 40144421. The next prime is 40144459. The reversal of 40144455 is 55444104.

It is not a de Polignac number, because 40144455 - 2¹¹ = 40142407 is a prime.

It is a super-2 number, since 2×40144455² = 3223154534494050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144459) 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, 95145 + ... + 95565.

It is an arithmetic number, because the mean of its divisors is an integer number (1574482).

Almost surely, 2^40144455 is an apocalyptic number.

40144455 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40144455 is a deficient number, since it is larger than the sum of its proper divisors (35430681).

40144455 is a wasteful number, since it uses less digits than its factorization.

40144455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 605 counting only the distinct ones).

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

The square root of 40144455 is about 6335.9651987681. The cubic root of 40144455 is about 342.4063856961.

Adding to 40144455 its reverse (55444104), we get a palindrome (95588559).

The spelling of 40144455 in words is "forty million, one hundred forty-four thousand, four hundred fifty-five".