40155644 has 6 divisors (see below), whose sum is σ = 70272384. Its totient is φ = 20077820.

The previous prime is 40155623. The next prime is 40155653. The reversal of 40155644 is 44655104.

It is a super-2 number, since 2×40155644² = 3224951490109472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5019452 + ... + 5019459.

It is an arithmetic number, because the mean of its divisors is an integer number (11712064).

Almost surely, 2^40155644 is an apocalyptic number.

It is an amenable number.

40155644 is a deficient number, since it is larger than the sum of its proper divisors (30116740).

40155644 is a wasteful number, since it uses less digits than its factorization.

40155644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10038915 (or 10038913 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 40155644 is about 6336.8481124294. The cubic root of 40155644 is about 342.4381943993.

The spelling of 40155644 in words is "forty million, one hundred fifty-five thousand, six hundred forty-four".