45040239 has 16 divisors (see below), whose sum is σ = 66880000. Its totient is φ = 29957688.

The previous prime is 45040231. The next prime is 45040313. The reversal of 45040239 is 93204054.

It is not a de Polignac number, because 45040239 - 2³ = 45040231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45040231) 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, 11802 + ... + 15144.

It is an arithmetic number, because the mean of its divisors is an integer number (4180000).

Almost surely, 2^45040239 is an apocalyptic number.

45040239 is a deficient number, since it is larger than the sum of its proper divisors (21839761).

45040239 is a wasteful number, since it uses less digits than its factorization.

45040239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3851 (or 3845 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 45040239 is about 6711.2025002975. The cubic root of 45040239 is about 355.7953179970.

The spelling of 45040239 in words is "forty-five million, forty thousand, two hundred thirty-nine".