77955742 has 16 divisors (see below), whose sum is σ = 118424592. Its totient is φ = 38484160.

The previous prime is 77955737. The next prime is 77955749. The reversal of 77955742 is 24755977.

It is a junction number, because it is equal to n+sod(n) for n = 77955692 and 77955701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77955749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60408 + ... + 61684.

It is an arithmetic number, because the mean of its divisors is an integer number (7401537).

Almost surely, 2^77955742 is an apocalyptic number.

77955742 is a deficient number, since it is larger than the sum of its proper divisors (40468850).

77955742 is a wasteful number, since it uses less digits than its factorization.

77955742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643.

The product of its digits is 617400, while the sum is 46.

The square root of 77955742 is about 8829.2548949501. The cubic root of 77955742 is about 427.1850412019.

The spelling of 77955742 in words is "seventy-seven million, nine hundred fifty-five thousand, seven hundred forty-two".