781052290 has 16 divisors (see below), whose sum is σ = 1406629440. Its totient is φ = 312257520.

The previous prime is 781052287. The next prime is 781052297. The reversal of 781052290 is 92250187.

781052290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×781052290² = 1220085359428488200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781052297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691 + ... + 39529.

It is an arithmetic number, because the mean of its divisors is an integer number (87914340).

Almost surely, 2^781052290 is an apocalyptic number.

781052290 is a deficient number, since it is larger than the sum of its proper divisors (625577150).

781052290 is a wasteful number, since it uses less digits than its factorization.

781052290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40857.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 781052290 is about 27947.3127509605. The cubic root of 781052290 is about 920.9301753194.

The spelling of 781052290 in words is "seven hundred eighty-one million, fifty-two thousand, two hundred ninety".