77055442 has 16 divisors (see below), whose sum is σ = 118396152. Its totient is φ = 37601280.

The previous prime is 77055439. The next prime is 77055449. The reversal of 77055442 is 24455077.

It can be written as a sum of positive squares in 4 ways, for example, as 71723961 + 5331481 = 8469^2 + 2309^2 .

It is a super-2 number, since 2×77055442² = 11875082283630728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77055398 and 77055407.

It is not an unprimeable number, because it can be changed into a prime (77055449) 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, 11442 + ... + 16882.

Almost surely, 2^77055442 is an apocalyptic number.

77055442 is a deficient number, since it is larger than the sum of its proper divisors (41340710).

77055442 is a wasteful number, since it uses less digits than its factorization.

77055442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613.

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 77055442 is about 8778.1229200781. The cubic root of 77055442 is about 425.5341693988.

The spelling of 77055442 in words is "seventy-seven million, fifty-five thousand, four hundred forty-two".