72778712 has 16 divisors (see below), whose sum is σ = 137868360. Its totient is φ = 36013824.

The previous prime is 72778711. The next prime is 72778729. The reversal of 72778712 is 21787727.

It is a self number, because there is not a number n which added to its sum of digits gives 72778712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72778711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46118 + ... + 47669.

Almost surely, 2^72778712 is an apocalyptic number.

It is an amenable number.

72778712 is a deficient number, since it is larger than the sum of its proper divisors (65089648).

72778712 is a wasteful number, since it uses less digits than its factorization.

72778712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93890 (or 93886 counting only the distinct ones).

The product of its digits is 76832, while the sum is 41.

The square root of 72778712 is about 8531.0440158283. The cubic root of 72778712 is about 417.5111919263.

The spelling of 72778712 in words is "seventy-two million, seven hundred seventy-eight thousand, seven hundred twelve".