40440145 has 8 divisors (see below), whose sum is σ = 49712040. Its totient is φ = 31562880.

The previous prime is 40440131. The next prime is 40440157. The reversal of 40440145 is 54104404.

It can be written as a sum of positive squares in 4 ways, for example, as 712336 + 39727809 = 844^2 + 6303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40440145 - 2⁷ = 40440017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98430 + ... + 98839.

It is an arithmetic number, because the mean of its divisors is an integer number (6214005).

Almost surely, 2^40440145 is an apocalyptic number.

It is an amenable number.

40440145 is a deficient number, since it is larger than the sum of its proper divisors (9271895).

40440145 is a wasteful number, since it uses less digits than its factorization.

40440145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197315.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40440145 is about 6359.2566389477. The cubic root of 40440145 is about 343.2450118957.

Adding to 40440145 its reverse (54104404), we get a palindrome (94544549).

The spelling of 40440145 in words is "forty million, four hundred forty thousand, one hundred forty-five".