72041540 has 24 divisors (see below), whose sum is σ = 159250560. Its totient is φ = 27299808.

The previous prime is 72041527. The next prime is 72041561. The reversal of 72041540 is 4514027.

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, 94412 + ... + 95171.

It is an arithmetic number, because the mean of its divisors is an integer number (6635440).

Almost surely, 2^72041540 is an apocalyptic number.

It is an amenable number.

72041540 is an abundant number, since it is smaller than the sum of its proper divisors (87209020).

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

72041540 is a wasteful number, since it uses less digits than its factorization.

72041540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189611 (or 189609 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 72041540 is about 8487.7287892581. The cubic root of 72041540 is about 416.0967554160.

Adding to 72041540 its reverse (4514027), we get a palindrome (76555567).

The spelling of 72041540 in words is "seventy-two million, forty-one thousand, five hundred forty".