40400340 has 24 divisors (see below), whose sum is σ = 113121120. Its totient is φ = 10773408.

The previous prime is 40400323. The next prime is 40400357. The reversal of 40400340 is 4300404.

40400340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40400323) and next prime (40400357).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336610 + ... + 336729.

It is an arithmetic number, because the mean of its divisors is an integer number (4713380).

Almost surely, 2^40400340 is an apocalyptic number.

It is an amenable number.

40400340 is an abundant number, since it is smaller than the sum of its proper divisors (72720780).

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

40400340 is a wasteful number, since it uses less digits than its factorization.

40400340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673351 (or 673349 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40400340 is about 6356.1261787350. The cubic root of 40400340 is about 343.1323569015.

Adding to 40400340 its reverse (4300404), we get a palindrome (44700744).

The spelling of 40400340 in words is "forty million, four hundred thousand, three hundred forty".