40389471 has 6 divisors (see below), whose sum is σ = 58340360. Its totient is φ = 26926308.

The previous prime is 40389443. The next prime is 40389473. The reversal of 40389471 is 17498304.

It is a happy number.

It is not a de Polignac number, because 40389471 - 2⁶ = 40389407 is a prime.

It is a super-3 number, since 3×40389471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40389473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2243851 + ... + 2243868.

Almost surely, 2^40389471 is an apocalyptic number.

40389471 is a deficient number, since it is larger than the sum of its proper divisors (17950889).

40389471 is a wasteful number, since it uses less digits than its factorization.

40389471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487725 (or 4487722 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 40389471 is about 6355.2711193151. The cubic root of 40389471 is about 343.1015829023.

The spelling of 40389471 in words is "forty million, three hundred eighty-nine thousand, four hundred seventy-one".