40641975 has 36 divisors (see below), whose sum is σ = 79416792. Its totient is φ = 19704000.

The previous prime is 40641967. The next prime is 40641977. The reversal of 40641975 is 57914604.

40641975 is a `hidden beast` number, since 4 + 0 + 641 + 9 + 7 + 5 = 666.

It is not a de Polignac number, because 40641975 - 2³ = 40641967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40641977) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5736 + ... + 10685.

It is an arithmetic number, because the mean of its divisors is an integer number (2206022).

Almost surely, 2^40641975 is an apocalyptic number.

40641975 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40641975 is a deficient number, since it is larger than the sum of its proper divisors (38774817).

40641975 is a wasteful number, since it uses less digits than its factorization.

40641975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16448 (or 16440 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 40641975 is about 6375.1058814737. The cubic root of 40641975 is about 343.8150907043.

It can be divided in two parts, 40641 and 975, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 40641975 in words is "forty million, six hundred forty-one thousand, nine hundred seventy-five".