781090022 has 8 divisors (see below), whose sum is σ = 1173938400. Its totient is φ = 389777224.

The previous prime is 781089997. The next prime is 781090027. The reversal of 781090022 is 220090187.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×781090022² = 1220203244935920968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781090027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382622 + ... + 384657.

It is an arithmetic number, because the mean of its divisors is an integer number (146742300).

Almost surely, 2^781090022 is an apocalyptic number.

781090022 is a deficient number, since it is larger than the sum of its proper divisors (392848378).

781090022 is a wasteful number, since it uses less digits than its factorization.

781090022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767790.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 781090022 is about 27947.9877987665. The cubic root of 781090022 is about 920.9450048762.

The spelling of 781090022 in words is "seven hundred eighty-one million, ninety thousand, twenty-two".