40001404 has 12 divisors (see below), whose sum is σ = 71710128. Its totient is φ = 19512800.

The previous prime is 40001399. The next prime is 40001407. The reversal of 40001404 is 40410004.

It is a happy number.

It is a super-2 number, since 2×40001404² = 3200224643942432, which contains 22 as substring.

40001404 is a modest number, since divided by 1404 gives 40 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001407) 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, 121792 + ... + 122119.

It is an arithmetic number, because the mean of its divisors is an integer number (5975844).

Almost surely, 2^40001404 is an apocalyptic number.

It is an amenable number.

40001404 is a deficient number, since it is larger than the sum of its proper divisors (31708724).

40001404 is a wasteful number, since it uses less digits than its factorization.

40001404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243956 (or 243954 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40001404 is about 6324.6663153087. Note that the first 3 decimals coincide. The cubic root of 40001404 is about 341.9991906322. Note that the first 3 decimals are identical.

Adding to 40001404 its reverse (40410004), we get a palindrome (80411408).

The spelling of 40001404 in words is "forty million, one thousand, four hundred four".