40931685 has 24 divisors (see below), whose sum is σ = 71645184. Its totient is φ = 21615840.

The previous prime is 40931669. The next prime is 40931701. The reversal of 40931685 is 58613904.

It is an interprime number because it is at equal distance from previous prime (40931669) and next prime (40931701).

It is not a de Polignac number, because 40931685 - 2⁴ = 40931669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220 + ... + 9050.

It is an arithmetic number, because the mean of its divisors is an integer number (2985216).

Almost surely, 2^40931685 is an apocalyptic number.

40931685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40931685 is a deficient number, since it is larger than the sum of its proper divisors (30713499).

40931685 is a wasteful number, since it uses less digits than its factorization.

40931685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8945 (or 8942 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 40931685 is about 6397.7875081938. The cubic root of 40931685 is about 344.6301013421.

It can be divided in two parts, 40931 and 685, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 40931685 in words is "forty million, nine hundred thirty-one thousand, six hundred eighty-five".