40400471 has 4 divisors (see below), whose sum is σ = 41703744. Its totient is φ = 39097200.

The previous prime is 40400453. The next prime is 40400513. The reversal of 40400471 is 17400404.

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

It is not a de Polignac number, because 40400471 - 2²² = 36206167 is a prime.

It is a super-3 number, since 3×40400471³ (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 (40400431) 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, 651590 + ... + 651651.

It is an arithmetic number, because the mean of its divisors is an integer number (10425936).

Almost surely, 2^40400471 is an apocalyptic number.

40400471 is a deficient number, since it is larger than the sum of its proper divisors (1303273).

40400471 is a wasteful number, since it uses less digits than its factorization.

40400471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303272.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 40400471 is about 6356.1364837455. The cubic root of 40400471 is about 343.1327277753.

Adding to 40400471 its reverse (17400404), we get a palindrome (57800875).

The spelling of 40400471 in words is "forty million, four hundred thousand, four hundred seventy-one".