40400404 has 24 divisors (see below), whose sum is σ = 77900256. Its totient is φ = 18180000.

The previous prime is 40400389. The next prime is 40400413.

40400404 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102 + ... + 8989.

It is an arithmetic number, because the mean of its divisors is an integer number (3245844).

Almost surely, 2^40400404 is an apocalyptic number.

40400404 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40400404 is a deficient number, since it is larger than the sum of its proper divisors (37499852).

40400404 is a wasteful number, since it uses less digits than its factorization.

40400404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9207 (or 9205 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40400404 is about 6356.1312132460. The cubic root of 40400404 is about 343.1325380918.

It can be divided in two parts, 40400 and 404, that multiplied together give a square (16321600 = 4040²).

The spelling of 40400404 in words is "forty million, four hundred thousand, four hundred four".