40079540 has 24 divisors (see below), whose sum is σ = 89118792. Its totient is φ = 15088640.

The previous prime is 40079521. The next prime is 40079573. The reversal of 40079540 is 4597004.

It can be written as a sum of positive squares in 4 ways, for example, as 18438436 + 21641104 = 4294^2 + 4652^2 .

It is a super-2 number, since 2×40079540² = 3212739053223200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58601 + ... + 59280.

It is an arithmetic number, because the mean of its divisors is an integer number (3713283).

Almost surely, 2^40079540 is an apocalyptic number.

It is an amenable number.

40079540 is an abundant number, since it is smaller than the sum of its proper divisors (49039252).

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

40079540 is a wasteful number, since it uses less digits than its factorization.

40079540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117907 (or 117905 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 40079540 is about 6330.8403865522. The cubic root of 40079540 is about 342.2217250575.

The spelling of 40079540 in words is "forty million, seventy-nine thousand, five hundred forty".