40707840 has 72 divisors (see below), whose sum is σ = 130022928. Its totient is φ = 10854400.

The previous prime is 40707839. The next prime is 40707847. The reversal of 40707840 is 4870704.

It is a super-3 number, since 3×40707840³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 40707798 and 40707807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40707847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1461 + ... + 9140.

It is an arithmetic number, because the mean of its divisors is an integer number (1805874).

Almost surely, 2^40707840 is an apocalyptic number.

40707840 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 40707840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65011464).

40707840 is an abundant number, since it is smaller than the sum of its proper divisors (89315088).

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

40707840 is a wasteful number, since it uses less digits than its factorization.

40707840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10625 (or 10611 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 40707840 is about 6380.2695867808. The cubic root of 40707840 is about 344.0007211090. Note that the first 3 decimals are identical.

The spelling of 40707840 in words is "forty million, seven hundred seven thousand, eight hundred forty".