40647960 has 128 divisors (see below), whose sum is σ = 137937600. Its totient is φ = 10644480.

The previous prime is 40647889. The next prime is 40647961. The reversal of 40647960 is 6974604.

40647960 is a `hidden beast` number, since 4 + 0 + 647 + 9 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40647961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65572 + ... + 66188.

Almost surely, 2^40647960 is an apocalyptic number.

40647960 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40647960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68968800).

40647960 is an abundant number, since it is smaller than the sum of its proper divisors (97289640).

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

40647960 is a wasteful number, since it uses less digits than its factorization.

40647960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 40647960 is about 6375.5752681621. The cubic root of 40647960 is about 343.8319667896.

The spelling of 40647960 in words is "forty million, six hundred forty-seven thousand, nine hundred sixty".