40512340 has 48 divisors (see below), whose sum is σ = 93731904. Its totient is φ = 14585600.

The previous prime is 40512337. The next prime is 40512347. The reversal of 40512340 is 4321504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40512347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22680 + ... + 24400.

It is an arithmetic number, because the mean of its divisors is an integer number (1952748).

Almost surely, 2^40512340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40512340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46865952).

40512340 is an abundant number, since it is smaller than the sum of its proper divisors (53219564).

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

40512340 is a wasteful number, since it uses less digits than its factorization.

40512340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848 (or 1846 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40512340 is about 6364.9304788034. The cubic root of 40512340 is about 343.4491476779.

Adding to 40512340 its reverse (4321504), we get a palindrome (44833844).

The spelling of 40512340 in words is "forty million, five hundred twelve thousand, three hundred forty".