40478461 has 4 divisors (see below), whose sum is σ = 41874300. Its totient is φ = 39082624.

The previous prime is 40478447. The next prime is 40478489. The reversal of 40478461 is 16487404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25190361 + 15288100 = 5019^2 + 3910^2 .

It is a cyclic number.

It is not a de Polignac number, because 40478461 - 2⁵ = 40478429 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 (40478561) 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, 697876 + ... + 697933.

It is an arithmetic number, because the mean of its divisors is an integer number (10468575).

Almost surely, 2^40478461 is an apocalyptic number.

It is an amenable number.

40478461 is a deficient number, since it is larger than the sum of its proper divisors (1395839).

40478461 is a wasteful number, since it uses less digits than its factorization.

40478461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395838.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 40478461 is about 6362.2685419589. The cubic root of 40478461 is about 343.3533829579.

The spelling of 40478461 in words is "forty million, four hundred seventy-eight thousand, four hundred sixty-one".