77727942 has 48 divisors (see below), whose sum is σ = 174320640. Its totient is φ = 25015536.

The previous prime is 77727941. The next prime is 77727953. The reversal of 77727942 is 24972777.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77727941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66253 + ... + 67415.

It is an arithmetic number, because the mean of its divisors is an integer number (3631680).

Almost surely, 2^77727942 is an apocalyptic number.

77727942 is an abundant number, since it is smaller than the sum of its proper divisors (96592698).

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

77727942 is a wasteful number, since it uses less digits than its factorization.

77727942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297 (or 1294 counting only the distinct ones).

The product of its digits is 345744, while the sum is 45.

The square root of 77727942 is about 8816.3451611198. The cubic root of 77727942 is about 426.7685326710.

The spelling of 77727942 in words is "seventy-seven million, seven hundred twenty-seven thousand, nine hundred forty-two".