40040412 has 24 divisors (see below), whose sum is σ = 94144512. Its totient is φ = 13244400.

The previous prime is 40040411. The next prime is 40040471. The reversal of 40040412 is 21404004.

It is a junction number, because it is equal to n+sod(n) for n = 40040391 and 40040400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040411) 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, 11164 + ... + 14307.

It is an arithmetic number, because the mean of its divisors is an integer number (3922688).

Almost surely, 2^40040412 is an apocalyptic number.

It is an amenable number.

40040412 is an abundant number, since it is smaller than the sum of its proper divisors (54104100).

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

40040412 is a wasteful number, since it uses less digits than its factorization.

40040412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25609 (or 25607 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40040412 is about 6327.7493629252. The cubic root of 40040412 is about 342.1103231507.

Adding to 40040412 its reverse (21404004), we get a palindrome (61444416).

The spelling of 40040412 in words is "forty million, forty thousand, four hundred twelve".