780403868 has 6 divisors (see below), whose sum is σ = 1365706776. Its totient is φ = 390201932.

The previous prime is 780403837. The next prime is 780403937. The reversal of 780403868 is 868304087.

It is a happy number.

It is a super-2 number, since 2×780403868² = 1218060394378722848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97550480 + ... + 97550487.

It is an arithmetic number, because the mean of its divisors is an integer number (227617796).

Almost surely, 2^780403868 is an apocalyptic number.

It is an amenable number.

780403868 is a deficient number, since it is larger than the sum of its proper divisors (585302908).

780403868 is a wasteful number, since it uses less digits than its factorization.

780403868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195100971 (or 195100969 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 780403868 is about 27935.7095488910. The cubic root of 780403868 is about 920.6752556767.

The spelling of 780403868 in words is "seven hundred eighty million, four hundred three thousand, eight hundred sixty-eight".