780498385 has 16 divisors (see below), whose sum is σ = 961269120. Its totient is φ = 608164480.

The previous prime is 780498379. The next prime is 780498391. The reversal of 780498385 is 583894087.

It is an interprime number because it is at equal distance from previous prime (780498379) and next prime (780498391).

It is not a de Polignac number, because 780498385 - 2⁹ = 780497873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16221 + ... + 42709.

It is an arithmetic number, because the mean of its divisors is an integer number (60079320).

Almost surely, 2^780498385 is an apocalyptic number.

It is an amenable number.

780498385 is a deficient number, since it is larger than the sum of its proper divisors (180770735).

780498385 is a wasteful number, since it uses less digits than its factorization.

780498385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26648.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 780498385 is about 27937.4011855076. The cubic root of 780498385 is about 920.7124227359.

The spelling of 780498385 in words is "seven hundred eighty million, four hundred ninety-eight thousand, three hundred eighty-five".