40311012 has 48 divisors (see below), whose sum is σ = 113823360. Its totient is φ = 10839552.

The previous prime is 40310993. The next prime is 40311013. The reversal of 40311012 is 21011304.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (40311013) 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, 12687 + ... + 15542.

It is an arithmetic number, because the mean of its divisors is an integer number (2371320).

Almost surely, 2^40311012 is an apocalyptic number.

40311012 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

40311012 is an abundant number, since it is smaller than the sum of its proper divisors (73512348).

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

40311012 is a wasteful number, since it uses less digits than its factorization.

40311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28260 (or 28258 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 40311012 is about 6349.0953686332. The cubic root of 40311012 is about 342.8792736707.

Adding to 40311012 its reverse (21011304), we get a palindrome (61322316).

The spelling of 40311012 in words is "forty million, three hundred eleven thousand, twelve".