40155744 has 24 divisors (see below), whose sum is σ = 105409080. Its totient is φ = 13385216.

The previous prime is 40155737. The next prime is 40155761. The reversal of 40155744 is 44755104.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×40155744² = 3224967552387072, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 209049 + ... + 209240.

It is an arithmetic number, because the mean of its divisors is an integer number (4392045).

Almost surely, 2^40155744 is an apocalyptic number.

It is an amenable number.

40155744 is an abundant number, since it is smaller than the sum of its proper divisors (65253336).

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

40155744 is a wasteful number, since it uses less digits than its factorization.

40155744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418302 (or 418294 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 40155744 is about 6336.8560027825. The cubic root of 40155744 is about 342.4384786581.

The spelling of 40155744 in words is "forty million, one hundred fifty-five thousand, seven hundred forty-four".