40160640 has 128 divisors (see below), whose sum is σ = 137944800. Its totient is φ = 9879552.

The previous prime is 40160639. The next prime is 40160663. The reversal of 40160640 is 4606104.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×40160640² = 3225754010419200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24156 + ... + 25764.

Almost surely, 2^40160640 is an apocalyptic number.

40160640 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 40160640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68972400).

40160640 is an abundant number, since it is smaller than the sum of its proper divisors (97784160).

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

40160640 is a wasteful number, since it uses less digits than its factorization.

40160640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 40160640 is about 6337.2423024530. The cubic root of 40160640 is about 342.4523953941.

Adding to 40160640 its reverse (4606104), we get a palindrome (44766744).

The spelling of 40160640 in words is "forty million, one hundred sixty thousand, six hundred forty".