780872 has 8 divisors (see below), whose sum is σ = 1464150. Its totient is φ = 390432.

The previous prime is 780869. The next prime is 780877. The reversal of 780872 is 278087.

780872 = T₂₄₃ + T₂₄₄ + ... + T₂₆₆.

It is a happy number.

780872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 682276 + 98596 = 826^2 + 314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×780872² = 1219522160768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (780877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48797 + ... + 48812.

2⁷⁸⁰⁸⁷² is an apocalyptic number.

It is an amenable number.

780872 is a deficient number, since it is larger than the sum of its proper divisors (683278).

780872 is a wasteful number, since it uses less digits than its factorization.

780872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97615 (or 97611 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 780872 is about 883.6696215215. The cubic root of 780872 is about 92.0859310547.

The spelling of 780872 in words is "seven hundred eighty thousand, eight hundred seventy-two".