40731642 has 36 divisors (see below), whose sum is σ = 102662586. Its totient is φ = 11637360.

The previous prime is 40731637. The next prime is 40731671. The reversal of 40731642 is 24613704.

It can be written as a sum of positive squares in only one way, i.e., 29582721 + 11148921 = 5439^2 + 3339^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22209 + ... + 23972.

Almost surely, 2^40731642 is an apocalyptic number.

40731642 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

40731642 is an abundant number, since it is smaller than the sum of its proper divisors (61930944).

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

40731642 is a wasteful number, since it uses less digits than its factorization.

40731642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46203 (or 46193 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 40731642 is about 6382.1345958856. The cubic root of 40731642 is about 344.0677541412.

It can be divided in two parts, 4073 and 1642, that multiplied together give a palindrome (6687866).

The spelling of 40731642 in words is "forty million, seven hundred thirty-one thousand, six hundred forty-two".