40055838 has 24 divisors (see below), whose sum is σ = 84554568. Its totient is φ = 12648528.

The previous prime is 40055831. The next prime is 40055839. The reversal of 40055838 is 83855004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40055799 and 40055808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40055831) 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, 7081 + ... + 11412.

It is an arithmetic number, because the mean of its divisors is an integer number (3523107).

Almost surely, 2^40055838 is an apocalyptic number.

40055838 is an abundant number, since it is smaller than the sum of its proper divisors (44498730).

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

40055838 is a wasteful number, since it uses less digits than its factorization.

40055838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18536 (or 18517 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 40055838 is about 6328.9681623468. The cubic root of 40055838 is about 342.1542514056.

The spelling of 40055838 in words is "forty million, fifty-five thousand, eight hundred thirty-eight".