40002440 has 32 divisors (see below), whose sum is σ = 91152000. Its totient is φ = 15797184.

The previous prime is 40002437. The next prime is 40002463. The reversal of 40002440 is 4420004.

It is a super-3 number, since 3×40002440³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3170 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (2848500).

Almost surely, 2^40002440 is an apocalyptic number.

40002440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40002440 is an abundant number, since it is smaller than the sum of its proper divisors (51149560).

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

40002440 is a wasteful number, since it uses less digits than its factorization.

40002440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12749 (or 12745 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40002440 is about 6324.7482163324. The cubic root of 40002440 is about 342.0021430961.

Adding to 40002440 its reverse (4420004), we get a palindrome (44422444).

The spelling of 40002440 in words is "forty million, two thousand, four hundred forty".