40400481 has 8 divisors (see below), whose sum is σ = 58764384. Its totient is φ = 24485120.

The previous prime is 40400453. The next prime is 40400513. The reversal of 40400481 is 18400404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40400481 - 2⁶ = 40400417 is a prime.

It is a super-2 number, since 2×40400481² = 3264397730062722, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 612096 + ... + 612161.

It is an arithmetic number, because the mean of its divisors is an integer number (7345548).

Almost surely, 2^40400481 is an apocalyptic number.

It is an amenable number.

40400481 is a deficient number, since it is larger than the sum of its proper divisors (18363903).

40400481 is a wasteful number, since it uses less digits than its factorization.

40400481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224271.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 40400481 is about 6356.1372703868. The cubic root of 40400481 is about 343.1327560863.

Adding to 40400481 its reverse (18400404), we get a palindrome (58800885).

The spelling of 40400481 in words is "forty million, four hundred thousand, four hundred eighty-one".