72640070 has 32 divisors (see below), whose sum is σ = 135803520. Its totient is φ = 27941760.

The previous prime is 72640019. The next prime is 72640091. The reversal of 72640070 is 7004627.

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 15 ways as a sum of consecutive naturals, for example, 134000 + ... + 134540.

It is an arithmetic number, because the mean of its divisors is an integer number (4243860).

Almost surely, 2^72640070 is an apocalyptic number.

72640070 is a deficient number, since it is larger than the sum of its proper divisors (63163450).

72640070 is a wasteful number, since it uses less digits than its factorization.

72640070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 72640070 is about 8522.9144076425. The cubic root of 72640070 is about 417.2459065594.

Adding to 72640070 its reverse (7004627), we get a palindrome (79644697).

The spelling of 72640070 in words is "seventy-two million, six hundred forty thousand, seventy".