40027638 has 16 divisors (see below), whose sum is σ = 91491840. Its totient is φ = 11436456.

The previous prime is 40027619. The next prime is 40027643. The reversal of 40027638 is 83672004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476478 + ... + 476561.

It is an arithmetic number, because the mean of its divisors is an integer number (5718240).

Almost surely, 2^40027638 is an apocalyptic number.

40027638 is an abundant number, since it is smaller than the sum of its proper divisors (51464202).

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

40027638 is a wasteful number, since it uses less digits than its factorization.

40027638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953051.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 40027638 is about 6326.7399187891. The cubic root of 40027638 is about 342.0739383929.

The spelling of 40027638 in words is "forty million, twenty-seven thousand, six hundred thirty-eight".