77542442 has 16 divisors (see below), whose sum is σ = 117754560. Its totient is φ = 38294208.

The previous prime is 77542441. The next prime is 77542469. The reversal of 77542442 is 24424577.

It is a super-2 number, since 2×77542442² = 12025660622646728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77542441) 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 7 ways as a sum of consecutive naturals, for example, 59138 + ... + 60434.

It is an arithmetic number, because the mean of its divisors is an integer number (7359660).

Almost surely, 2^77542442 is an apocalyptic number.

77542442 is a deficient number, since it is larger than the sum of its proper divisors (40212118).

77542442 is a wasteful number, since it uses less digits than its factorization.

77542442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645.

The product of its digits is 62720, while the sum is 35.

The square root of 77542442 is about 8805.8186445100. The cubic root of 77542442 is about 426.4287637223.

The spelling of 77542442 in words is "seventy-seven million, five hundred forty-two thousand, four hundred forty-two".