40478479 has 4 divisors (see below), whose sum is σ = 42859584. Its totient is φ = 38097376.

The previous prime is 40478447. The next prime is 40478489. The reversal of 40478479 is 97487404.

It is a happy number.

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 40478479 - 2⁵ = 40478447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40478429) 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, 1190527 + ... + 1190560.

It is an arithmetic number, because the mean of its divisors is an integer number (10714896).

Almost surely, 2^40478479 is an apocalyptic number.

40478479 is a deficient number, since it is larger than the sum of its proper divisors (2381105).

40478479 is a wasteful number, since it uses less digits than its factorization.

40478479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381104.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 40478479 is about 6362.2699565485. The cubic root of 40478479 is about 343.3534338521.

The spelling of 40478479 in words is "forty million, four hundred seventy-eight thousand, four hundred seventy-nine".