40340394 has 24 divisors (see below), whose sum is σ = 87609600. Its totient is φ = 13415208.

The previous prime is 40340387. The next prime is 40340437. The reversal of 40340394 is 49304304.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6007 + ... + 10805.

It is an arithmetic number, because the mean of its divisors is an integer number (3650400).

Almost surely, 2^40340394 is an apocalyptic number.

40340394 is an abundant number, since it is smaller than the sum of its proper divisors (47269206).

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

40340394 is a wasteful number, since it uses less digits than its factorization.

40340394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274 (or 5271 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 40340394 is about 6351.4088200965. The cubic root of 40340394 is about 342.9625596977.

Adding to 40340394 its reverse (49304304), we get a palindrome (89644698).

The spelling of 40340394 in words is "forty million, three hundred forty thousand, three hundred ninety-four".