77867742 has 24 divisors (see below), whose sum is σ = 162807624. Its totient is φ = 24826384.

The previous prime is 77867731. The next prime is 77867743. The reversal of 77867742 is 24776877.

It is a junction number, because it is equal to n+sod(n) for n = 77867691 and 77867700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77867743) 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, 9093 + ... + 15440.

It is an arithmetic number, because the mean of its divisors is an integer number (6783651).

Almost surely, 2^77867742 is an apocalyptic number.

77867742 is an abundant number, since it is smaller than the sum of its proper divisors (84939882).

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

77867742 is a wasteful number, since it uses less digits than its factorization.

77867742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24584 (or 24561 counting only the distinct ones).

The product of its digits is 921984, while the sum is 48.

The square root of 77867742 is about 8824.2700547977. The cubic root of 77867742 is about 427.0242386883.

The spelling of 77867742 in words is "seventy-seven million, eight hundred sixty-seven thousand, seven hundred forty-two".