780724272 has 90 divisors (see below), whose sum is σ = 2092045788. Its totient is φ = 250884864.

The previous prime is 780724249. The next prime is 780724279. The reversal of 780724272 is 272427087.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 780724272.

It is not an unprimeable number, because it can be changed into a prime (780724279) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7162554 + ... + 7162662.

Almost surely, 2^780724272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780724272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046022894).

780724272 is an abundant number, since it is smaller than the sum of its proper divisors (1311321516).

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

780724272 is a wasteful number, since it uses less digits than its factorization.

780724272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 780724272 is about 27941.4436277011. The cubic root of 780724272 is about 920.8012364608.

The spelling of 780724272 in words is "seven hundred eighty million, seven hundred twenty-four thousand, two hundred seventy-two".