40311380 has 24 divisors (see below), whose sum is σ = 84883848. Its totient is φ = 16080768.

The previous prime is 40311379. The next prime is 40311391. The reversal of 40311380 is 8311304.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17405584 + 22905796 = 4172^2 + 4786^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5402 + ... + 10478.

It is an arithmetic number, because the mean of its divisors is an integer number (3536827).

Almost surely, 2^40311380 is an apocalyptic number.

It is an amenable number.

40311380 is an abundant number, since it is smaller than the sum of its proper divisors (44572468).

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

40311380 is a wasteful number, since it uses less digits than its factorization.

40311380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483 (or 5481 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40311380 is about 6349.1243490737. The cubic root of 40311380 is about 342.8803170513.

Adding to 40311380 its reverse (8311304), we get a palindrome (48622684).

It can be divided in two parts, 4031 and 1380, that multiplied together give a triangular number (5562780 = T₃₃₃₅).

The spelling of 40311380 in words is "forty million, three hundred eleven thousand, three hundred eighty".