40155647 has 6 divisors (see below), whose sum is σ = 46711728. Its totient is φ = 34419084.

The previous prime is 40155623. The next prime is 40155653. The reversal of 40155647 is 74655104.

It is not a de Polignac number, because 40155647 - 2¹⁰ = 40154623 is a prime.

It is a super-2 number, since 2×40155647² = 3224951971977218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40155617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 409703 + ... + 409800.

It is an arithmetic number, because the mean of its divisors is an integer number (7785288).

Almost surely, 2^40155647 is an apocalyptic number.

40155647 is a deficient number, since it is larger than the sum of its proper divisors (6556081).

40155647 is an equidigital number, since it uses as much as digits as its factorization.

40155647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819517 (or 819510 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 40155647 is about 6336.8483491401. The cubic root of 40155647 is about 342.4382029271.

The spelling of 40155647 in words is "forty million, one hundred fifty-five thousand, six hundred forty-seven".