77143542 has 48 divisors (see below), whose sum is σ = 180937152. Its totient is φ = 21861840.

The previous prime is 77143537. The next prime is 77143571. The reversal of 77143542 is 24534177.

It is a super-2 number, since 2×77143542² = 11902252144611528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37513 + ... + 39515.

It is an arithmetic number, because the mean of its divisors is an integer number (3769524).

Almost surely, 2^77143542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77143542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90468576).

77143542 is an abundant number, since it is smaller than the sum of its proper divisors (103793610).

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

77143542 is a wasteful number, since it uses less digits than its factorization.

77143542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153 (or 2146 counting only the distinct ones).

The product of its digits is 23520, while the sum is 33.

The square root of 77143542 is about 8783.1396436582. The cubic root of 77143542 is about 425.6962833293.

The spelling of 77143542 in words is "seventy-seven million, one hundred forty-three thousand, five hundred forty-two".