40260720 has 80 divisors (see below), whose sum is σ = 125527680. Its totient is φ = 10674432.

The previous prime is 40260713. The next prime is 40260739. The reversal of 40260720 is 2706204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54111 + ... + 54849.

It is an arithmetic number, because the mean of its divisors is an integer number (1569096).

Almost surely, 2^40260720 is an apocalyptic number.

40260720 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 40260720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62763840).

40260720 is an abundant number, since it is smaller than the sum of its proper divisors (85266960).

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

40260720 is a wasteful number, since it uses less digits than its factorization.

40260720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40260720 is about 6345.1335683341. The cubic root of 40260720 is about 342.7366223223.

Adding to 40260720 its reverse (2706204), we get a palindrome (42966924).

The spelling of 40260720 in words is "forty million, two hundred sixty thousand, seven hundred twenty".