40407420 has 24 divisors (see below), whose sum is σ = 113140944. Its totient is φ = 10775296.

The previous prime is 40407407. The next prime is 40407421. The reversal of 40407420 is 2470404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40407421) 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, 336669 + ... + 336788.

It is an arithmetic number, because the mean of its divisors is an integer number (4714206).

Almost surely, 2^40407420 is an apocalyptic number.

It is an amenable number.

40407420 is an abundant number, since it is smaller than the sum of its proper divisors (72733524).

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

40407420 is a wasteful number, since it uses less digits than its factorization.

40407420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673469 (or 673467 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 40407420 is about 6356.6830973394. The cubic root of 40407420 is about 343.1523999274.

Adding to 40407420 its reverse (2470404), we get a palindrome (42877824).

The spelling of 40407420 in words is "forty million, four hundred seven thousand, four hundred twenty".