40636542 has 16 divisors (see below), whose sum is σ = 82078992. Its totient is φ = 13411200.

The previous prime is 40636537. The next prime is 40636549. The reversal of 40636542 is 24563604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40636549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32923 + ... + 34134.

It is an arithmetic number, because the mean of its divisors is an integer number (5129937).

Almost surely, 2^40636542 is an apocalyptic number.

40636542 is an abundant number, since it is smaller than the sum of its proper divisors (41442450).

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

40636542 is a wasteful number, since it uses less digits than its factorization.

40636542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67163.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 40636542 is about 6374.6797566623. The cubic root of 40636542 is about 343.7997696753.

The spelling of 40636542 in words is "forty million, six hundred thirty-six thousand, five hundred forty-two".