781076442 has 16 divisors (see below), whose sum is σ = 1565146080. Its totient is φ = 259859952.

The previous prime is 781076437. The next prime is 781076447. The reversal of 781076442 is 244670187.

It is an interprime number because it is at equal distance from previous prime (781076437) and next prime (781076447).

It is a super-2 number, since 2×781076442² = 1220160816494758728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 781076442.

It is not an unprimeable number, because it can be changed into a prime (781076447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121317 + ... + 127592.

It is an arithmetic number, because the mean of its divisors is an integer number (97821630).

Almost surely, 2^781076442 is an apocalyptic number.

781076442 is an abundant number, since it is smaller than the sum of its proper divisors (784069638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

781076442 is a wasteful number, since it uses less digits than its factorization.

781076442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249437.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 781076442 is about 27947.7448464093. The cubic root of 781076442 is about 920.9396676742.

The spelling of 781076442 in words is "seven hundred eighty-one million, seventy-six thousand, four hundred forty-two".