40145539 has 16 divisors (see below), whose sum is σ = 47044800. Its totient is φ = 33546240.

The previous prime is 40145533. The next prime is 40145549. The reversal of 40145539 is 93554104.

It is not a de Polignac number, because 40145539 - 2⁷ = 40145411 is a prime.

It is a super-2 number, since 2×40145539² = 3223328603201042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40145539.

It is not an unprimeable number, because it can be changed into a prime (40145533) 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, 89187 + ... + 89635.

It is an arithmetic number, because the mean of its divisors is an integer number (2940300).

Almost surely, 2^40145539 is an apocalyptic number.

40145539 is a deficient number, since it is larger than the sum of its proper divisors (6899261).

40145539 is a wasteful number, since it uses less digits than its factorization.

40145539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 40145539 is about 6336.0507415897. The cubic root of 40145539 is about 342.4094676093.

The spelling of 40145539 in words is "forty million, one hundred forty-five thousand, five hundred thirty-nine".