40404340 has 24 divisors (see below), whose sum is σ = 84994560. Its totient is φ = 16134048.

The previous prime is 40404319. The next prime is 40404361. The reversal of 40404340 is 4340404.

It is an interprime number because it is at equal distance from previous prime (40404319) and next prime (40404361).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13501 + ... + 16219.

It is an arithmetic number, because the mean of its divisors is an integer number (3541440).

Almost surely, 2^40404340 is an apocalyptic number.

It is an amenable number.

40404340 is an abundant number, since it is smaller than the sum of its proper divisors (44590220).

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

40404340 is a wasteful number, since it uses less digits than its factorization.

40404340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471 (or 3469 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40404340 is about 6356.4408280106. The cubic root of 40404340 is about 343.1436809327.

Adding to 40404340 its reverse (4340404), we get a palindrome (44744744).

The spelling of 40404340 in words is "forty million, four hundred four thousand, three hundred forty".