40440342 has 16 divisors (see below), whose sum is σ = 80956080. Its totient is φ = 13467552.

The previous prime is 40440319. The next prime is 40440347. The reversal of 40440342 is 24304404.

It is a super-2 number, since 2×40440342² = 3270842522153928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440347) 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, 5784 + ... + 10692.

It is an arithmetic number, because the mean of its divisors is an integer number (5059755).

Almost surely, 2^40440342 is an apocalyptic number.

40440342 is an abundant number, since it is smaller than the sum of its proper divisors (40515738).

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

40440342 is a wasteful number, since it uses less digits than its factorization.

40440342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6287.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 40440342 is about 6359.2721281606. The cubic root of 40440342 is about 343.2455692557.

Adding to 40440342 its reverse (24304404), we get a palindrome (64744746).

The spelling of 40440342 in words is "forty million, four hundred forty thousand, three hundred forty-two".