780709990 has 16 divisors (see below), whose sum is σ = 1443259152. Its totient is φ = 303843744.

The previous prime is 780709973. The next prime is 780710003. The reversal of 780709990 is 99907087.

It is a super-3 number, since 3×780709990³ (a number of 28 digits) contains 333 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054644 + ... + 1055383.

It is an arithmetic number, because the mean of its divisors is an integer number (90203697).

Almost surely, 2^780709990 is an apocalyptic number.

780709990 is a deficient number, since it is larger than the sum of its proper divisors (662549162).

780709990 is a wasteful number, since it uses less digits than its factorization.

780709990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110071.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 780709990 is about 27941.1880563443. The cubic root of 780709990 is about 920.7956216046.

The spelling of 780709990 in words is "seven hundred eighty million, seven hundred nine thousand, nine hundred ninety".