780087 has 24 divisors (see below), whose sum is σ = 1310848. Its totient is φ = 403920.

The previous prime is 780061. The next prime is 780119.

It is a happy number.

780087 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 780087 - 2¹⁰ = 779063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2388 + ... + 2694.

2⁷⁸⁰⁰⁸⁷ is an apocalyptic number.

780087 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

780087 is a deficient number, since it is larger than the sum of its proper divisors (530761).

780087 is a wasteful number, since it uses less digits than its factorization.

780087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 780087 is about 883.2253393104. The cubic root of 780087 is about 92.0550631307.

It can be divided in two parts, 7800 and 87, that added together give a palindrome (7887).

The spelling of 780087 in words is "seven hundred eighty thousand, eighty-seven".