77743042 has 20 divisors (see below), whose sum is σ = 126424926. Its totient is φ = 35855040.

The previous prime is 77743037. The next prime is 77743067. The reversal of 77743042 is 24034777.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 22553001 + 55190041 = 4749^2 + 7429^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77742989 and 77743007.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 56442 + ... + 57802.

Almost surely, 2^77743042 is an apocalyptic number.

77743042 is a deficient number, since it is larger than the sum of its proper divisors (48681884).

77743042 is an equidigital number, since it uses as much as digits as its factorization.

77743042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1376 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 77743042 is about 8817.2014834640. The cubic root of 77743042 is about 426.7961666098.

It can be divided in two parts, 7774 and 3042, that added together give a square (10816 = 104²).

The spelling of 77743042 in words is "seventy-seven million, seven hundred forty-three thousand, forty-two".