77690142 has 24 divisors (see below), whose sum is σ = 168746760. Its totient is φ = 25832400.

The previous prime is 77690131. The next prime is 77690143. The reversal of 77690142 is 24109677.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77690097 and 77690106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77690143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2392 + ... + 12692.

It is an arithmetic number, because the mean of its divisors is an integer number (7031115).

Almost surely, 2^77690142 is an apocalyptic number.

77690142 is an abundant number, since it is smaller than the sum of its proper divisors (91056618).

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

77690142 is a wasteful number, since it uses less digits than its factorization.

77690142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10728 (or 10725 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 77690142 is about 8814.2011549544. The cubic root of 77690142 is about 426.6993406239.

The spelling of 77690142 in words is "seventy-seven million, six hundred ninety thousand, one hundred forty-two".