40253720 has 64 divisors (see below), whose sum is σ = 98280000. Its totient is φ = 14750208.

The previous prime is 40253713. The next prime is 40253737. The reversal of 40253720 is 2735204.

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, 103286 + ... + 103674.

It is an arithmetic number, because the mean of its divisors is an integer number (1535625).

Almost surely, 2^40253720 is an apocalyptic number.

40253720 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 40253720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49140000).

40253720 is an abundant number, since it is smaller than the sum of its proper divisors (58026280).

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

40253720 is a wasteful number, since it uses less digits than its factorization.

40253720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 40253720 is about 6344.5819405222. The cubic root of 40253720 is about 342.7167576717.

Adding to 40253720 its reverse (2735204), we get a palindrome (42988924).

The spelling of 40253720 in words is "forty million, two hundred fifty-three thousand, seven hundred twenty".