780135942 has 32 divisors (see below), whose sum is σ = 1629854208. Its totient is φ = 248472576.

The previous prime is 780135929. The next prime is 780135943. The reversal of 780135942 is 249531087.

It is a super-2 number, since 2×780135942² = 1217224176000454728, 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 780135942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780135943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156663 + ... + 161565.

It is an arithmetic number, because the mean of its divisors is an integer number (50932944).

Almost surely, 2^780135942 is an apocalyptic number.

780135942 is an abundant number, since it is smaller than the sum of its proper divisors (849718266).

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

780135942 is a wasteful number, since it uses less digits than its factorization.

780135942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6084.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 780135942 is about 27930.9137337109. The cubic root of 780135942 is about 920.5698824279.

The spelling of 780135942 in words is "seven hundred eighty million, one hundred thirty-five thousand, nine hundred forty-two".