40061320 has 32 divisors (see below), whose sum is σ = 97072920. Its totient is φ = 14791680.

The previous prime is 40061311. The next prime is 40061339. The reversal of 40061320 is 2316004.

It can be written as a sum of positive squares in 4 ways, for example, as 31382404 + 8678916 = 5602^2 + 2946^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40061294 and 40061303.

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, 38001 + ... + 39040.

Almost surely, 2^40061320 is an apocalyptic number.

40061320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40061320 is an abundant number, since it is smaller than the sum of its proper divisors (57011600).

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

40061320 is a wasteful number, since it uses less digits than its factorization.

40061320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77065 (or 77061 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40061320 is about 6329.4012355040. The cubic root of 40061320 is about 342.1698596509.

Adding to 40061320 its reverse (2316004), we get a palindrome (42377324).

The spelling of 40061320 in words is "forty million, sixty-one thousand, three hundred twenty".