40002420 has 24 divisors (see below), whose sum is σ = 112006944. Its totient is φ = 10667296.

The previous prime is 40002379. The next prime is 40002421. The reversal of 40002420 is 2420004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 40002396 and 40002405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40002421) 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, 333294 + ... + 333413.

It is an arithmetic number, because the mean of its divisors is an integer number (4666956).

Almost surely, 2^40002420 is an apocalyptic number.

It is an amenable number.

40002420 is an abundant number, since it is smaller than the sum of its proper divisors (72004524).

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

40002420 is a wasteful number, since it uses less digits than its factorization.

40002420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666719 (or 666717 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 40002420 is about 6324.7466352416. The cubic root of 40002420 is about 342.0020860992.

Adding to 40002420 its reverse (2420004), we get a palindrome (42422424).

The spelling of 40002420 in words is "forty million, two thousand, four hundred twenty".