40687438 has 16 divisors (see below), whose sum is σ = 68728320. Its totient is φ = 17897400.

The previous prime is 40687397. The next prime is 40687441. The reversal of 40687438 is 83478604.

It is a super-2 number, since 2×40687438² = 3310935222007688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40687438.

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, 29148 + ... + 30511.

It is an arithmetic number, because the mean of its divisors is an integer number (4295520).

Almost surely, 2^40687438 is an apocalyptic number.

40687438 is a deficient number, since it is larger than the sum of its proper divisors (28040882).

40687438 is a wasteful number, since it uses less digits than its factorization.

40687438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59703.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 40687438 is about 6378.6705511415. The cubic root of 40687438 is about 343.9432426190.

The spelling of 40687438 in words is "forty million, six hundred eighty-seven thousand, four hundred thirty-eight".