40040479 has 4 divisors (see below), whose sum is σ = 40328680. Its totient is φ = 39752280.

The previous prime is 40040471. The next prime is 40040489. The reversal of 40040479 is 97404004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40040479 - 2³ = 40040471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143892 + ... + 144169.

It is an arithmetic number, because the mean of its divisors is an integer number (10082170).

Almost surely, 2^40040479 is an apocalyptic number.

40040479 is a deficient number, since it is larger than the sum of its proper divisors (288201).

40040479 is a wasteful number, since it uses less digits than its factorization.

40040479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288200.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40040479 is about 6327.7546570644. The cubic root of 40040479 is about 342.1105139694.

The spelling of 40040479 in words is "forty million, forty thousand, four hundred seventy-nine".