40110640 has 20 divisors (see below), whose sum is σ = 93257424. Its totient is φ = 16044224.

The previous prime is 40110617. The next prime is 40110649. The reversal of 40110640 is 4601104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (40110649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250612 + ... + 250771.

Almost surely, 2^40110640 is an apocalyptic number.

40110640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40110640 is an abundant number, since it is smaller than the sum of its proper divisors (53146784).

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

40110640 is a wasteful number, since it uses less digits than its factorization.

40110640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501396 (or 501390 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 40110640 is about 6333.2961402417. The cubic root of 40110640 is about 342.3102186212.

Adding to 40110640 its reverse (4601104), we get a palindrome (44711744).

The spelling of 40110640 in words is "forty million, one hundred ten thousand, six hundred forty".