40740040 has 64 divisors (see below), whose sum is σ = 101943360. Its totient is φ = 14526720.

The previous prime is 40739999. The next prime is 40740043. The reversal of 40740040 is 4004704.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40740043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22447 + ... + 24193.

It is an arithmetic number, because the mean of its divisors is an integer number (1592865).

Almost surely, 2^40740040 is an apocalyptic number.

40740040 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 40740040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50971680).

40740040 is an abundant number, since it is smaller than the sum of its proper divisors (61203320).

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

40740040 is a wasteful number, since it uses less digits than its factorization.

40740040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1818 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 40740040 is about 6382.7924923187. The cubic root of 40740040 is about 344.0913990055.

Adding to 40740040 its reverse (4004704), we get a palindrome (44744744).

The spelling of 40740040 in words is "forty million, seven hundred forty thousand, forty".