40418720 has 24 divisors (see below), whose sum is σ = 95489604. Its totient is φ = 16167424.

The previous prime is 40418633. The next prime is 40418767. The reversal of 40418720 is 2781404.

40418720 is nontrivially palindromic in base 3 and base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 36529936 + 3888784 = 6044^2 + 1972^2 .

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 40418720.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126149 + ... + 126468.

Almost surely, 2^40418720 is an apocalyptic number.

40418720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40418720 is an abundant number, since it is smaller than the sum of its proper divisors (55070884).

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

40418720 is a wasteful number, since it uses less digits than its factorization.

40418720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252632 (or 252624 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40418720 is about 6357.5718635341. The cubic root of 40418720 is about 343.1843846529.

The spelling of 40418720 in words is "forty million, four hundred eighteen thousand, seven hundred twenty".