40104640 has 56 divisors (see below), whose sum is σ = 99669600. Its totient is φ = 15341568.

The previous prime is 40104613. The next prime is 40104653. The reversal of 40104640 is 4640104.

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, 4636 + ... + 10084.

Almost surely, 2^40104640 is an apocalyptic number.

40104640 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 40104640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49834800).

40104640 is an abundant number, since it is smaller than the sum of its proper divisors (59564960).

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

40104640 is a wasteful number, since it uses less digits than its factorization.

40104640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5489 (or 5479 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40104640 is about 6332.8224355338. The cubic root of 40104640 is about 342.2931494700.

Adding to 40104640 its reverse (4640104), we get a palindrome (44744744).

The spelling of 40104640 in words is "forty million, one hundred four thousand, six hundred forty".