40000320 has 336 divisors, whose sum is σ = 156911040. Its totient is φ = 9289728.

The previous prime is 40000313. The next prime is 40000321. The reversal of 40000320 is 2300004.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 930219 + ... + 930261.

Almost surely, 2^40000320 is an apocalyptic number.

40000320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40000320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78455520).

40000320 is an abundant number, since it is smaller than the sum of its proper divisors (116910720).

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

40000320 is a wasteful number, since it uses less digits than its factorization.

40000320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 40000320 is about 6324.5806185074. The cubic root of 40000320 is about 341.9961013201.

Adding to 40000320 its reverse (2300004), we get a palindrome (42300324).

The spelling of 40000320 in words is "forty million, three hundred twenty", and thus it is an aban number.