780909087 has 48 divisors (see below), whose sum is σ = 1277240832. Its totient is φ = 414944640.

The previous prime is 780909079. The next prime is 780909097.

780909087 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 780909087 - 2³ = 780909079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780909037) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 660637 + ... + 661817.

It is an arithmetic number, because the mean of its divisors is an integer number (26609184).

Almost surely, 2^780909087 is an apocalyptic number.

780909087 is a deficient number, since it is larger than the sum of its proper divisors (496331745).

780909087 is a wasteful number, since it uses less digits than its factorization.

780909087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 780909087 is about 27944.7506161712. The cubic root of 780909087 is about 920.8738888512.

The spelling of 780909087 in words is "seven hundred eighty million, nine hundred nine thousand, eighty-seven".