787997142 has 24 divisors (see below), whose sum is σ = 1708086744. Its totient is φ = 262548864.

The previous prime is 787997137. The next prime is 787997149. The reversal of 787997142 is 241799787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787997149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38233 + ... + 55115.

It is an arithmetic number, because the mean of its divisors is an integer number (71170281).

Almost surely, 2^787997142 is an apocalyptic number.

787997142 is an abundant number, since it is smaller than the sum of its proper divisors (920089602).

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

787997142 is a wasteful number, since it uses less digits than its factorization.

787997142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19484 (or 19481 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 787997142 is about 28071.2867891730. The cubic root of 787997142 is about 923.6516579219.

The spelling of 787997142 in words is "seven hundred eighty-seven million, nine hundred ninety-seven thousand, one hundred forty-two".