40739145 has 16 divisors (see below), whose sum is σ = 65601600. Its totient is φ = 21587904.

The previous prime is 40739143. The next prime is 40739197. The reversal of 40739145 is 54193704.

It is not a de Polignac number, because 40739145 - 2¹ = 40739143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40739143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6295 + ... + 11004.

It is an arithmetic number, because the mean of its divisors is an integer number (4100100).

Almost surely, 2^40739145 is an apocalyptic number.

It is an amenable number.

40739145 is a deficient number, since it is larger than the sum of its proper divisors (24862455).

40739145 is a wasteful number, since it uses less digits than its factorization.

40739145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17464.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 40739145 is about 6382.7223815548. The cubic root of 40739145 is about 344.0888792562.

The spelling of 40739145 in words is "forty million, seven hundred thirty-nine thousand, one hundred forty-five".