40155404 has 6 divisors (see below), whose sum is σ = 70271964. Its totient is φ = 20077700.

The previous prime is 40155403. The next prime is 40155407. The reversal of 40155404 is 40455104.

It is a super-2 number, since 2×40155404² = 3224912940806432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40155404.

It is not an unprimeable number, because it can be changed into a prime (40155403) by changing a digit.

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 as a sum of consecutive naturals, namely, 5019422 + ... + 5019429.

It is an arithmetic number, because the mean of its divisors is an integer number (11711994).

Almost surely, 2^40155404 is an apocalyptic number.

It is an amenable number.

40155404 is a deficient number, since it is larger than the sum of its proper divisors (30116560).

40155404 is a wasteful number, since it uses less digits than its factorization.

40155404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10038855 (or 10038853 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 40155404 is about 6336.8291755420. The cubic root of 40155404 is about 342.4375121761.

The spelling of 40155404 in words is "forty million, one hundred fifty-five thousand, four hundred four".