72940761 has 12 divisors (see below), whose sum is σ = 111556692. Its totient is φ = 45766656.

The previous prime is 72940759. The next prime is 72940793. The reversal of 72940761 is 16704927.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48734361 + 24206400 = 6981^2 + 4920^2 .

It is not a de Polignac number, because 72940761 - 2¹ = 72940759 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72940711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238216 + ... + 238521.

It is an arithmetic number, because the mean of its divisors is an integer number (9296391).

Almost surely, 2^72940761 is an apocalyptic number.

It is an amenable number.

72940761 is a deficient number, since it is larger than the sum of its proper divisors (38615931).

72940761 is a wasteful number, since it uses less digits than its factorization.

72940761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476760 (or 476757 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 72940761 is about 8540.5363414718. The cubic root of 72940761 is about 417.8208388734.

The spelling of 72940761 in words is "seventy-two million, nine hundred forty thousand, seven hundred sixty-one".