40120680 has 128 divisors (see below), whose sum is σ = 129703680. Its totient is φ = 9891840.

The previous prime is 40120679. The next prime is 40120699. The reversal of 40120680 is 8602104.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144702 + ... + 144978.

It is an arithmetic number, because the mean of its divisors is an integer number (1013310).

Almost surely, 2^40120680 is an apocalyptic number.

40120680 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 40120680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64851840).

40120680 is an abundant number, since it is smaller than the sum of its proper divisors (89583000).

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

40120680 is a wasteful number, since it uses less digits than its factorization.

40120680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 40120680 is about 6334.0887268809. The cubic root of 40120680 is about 342.3387771939.

Adding to 40120680 its reverse (8602104), we get a palindrome (48722784).

The spelling of 40120680 in words is "forty million, one hundred twenty thousand, six hundred eighty".