72961786 has 32 divisors (see below), whose sum is σ = 119877120. Its totient is φ = 33177600.

The previous prime is 72961783. The next prime is 72961789. The reversal of 72961786 is 68716927.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72961783) and next prime (72961789).

It is not an unprimeable number, because it can be changed into a prime (72961783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283770 + ... + 284026.

It is an arithmetic number, because the mean of its divisors is an integer number (3746160).

Almost surely, 2^72961786 is an apocalyptic number.

72961786 is a deficient number, since it is larger than the sum of its proper divisors (46915334).

72961786 is a wasteful number, since it uses less digits than its factorization.

72961786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its digits is 254016, while the sum is 46.

The square root of 72961786 is about 8541.7671473765. The cubic root of 72961786 is about 417.8609803028.

The spelling of 72961786 in words is "seventy-two million, nine hundred sixty-one thousand, seven hundred eighty-six".