40155444 has 36 divisors (see below), whose sum is σ = 116005344. Its totient is φ = 11472912.

The previous prime is 40155443. The next prime is 40155449. The reversal of 40155444 is 44455104.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40155444² = 3224919365674272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40155443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79422 + ... + 79925.

Almost surely, 2^40155444 is an apocalyptic number.

It is an amenable number.

40155444 is an abundant number, since it is smaller than the sum of its proper divisors (75849900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40155444 is a wasteful number, since it uses less digits than its factorization.

40155444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159364 (or 159359 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 40155444 is about 6336.8323316938. The cubic root of 40155444 is about 342.4376258802.

The spelling of 40155444 in words is "forty million, one hundred fifty-five thousand, four hundred forty-four".