40400104 has 8 divisors (see below), whose sum is σ = 75750210. Its totient is φ = 20200048.

The previous prime is 40400093. The next prime is 40400123. The reversal of 40400104 is 40100404.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30802500 + 9597604 = 5550^2 + 3098^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2524999 + ... + 2525014.

Almost surely, 2^40400104 is an apocalyptic number.

It is an amenable number.

40400104 is a deficient number, since it is larger than the sum of its proper divisors (35350106).

40400104 is a wasteful number, since it uses less digits than its factorization.

40400104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050019 (or 5050015 counting only the distinct ones).

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

The square root of 40400104 is about 6356.1076139411. The cubic root of 40400104 is about 343.1316887603.

Adding to 40400104 its reverse (40100404), we get a palindrome (80500508).

It can be divided in two parts, 40400 and 104, that added together give a palindrome (40504).

The spelling of 40400104 in words is "forty million, four hundred thousand, one hundred four".