77422944 has 96 divisors (see below), whose sum is σ = 212357376. Its totient is φ = 24675840.

The previous prime is 77422921. The next prime is 77422949. The reversal of 77422944 is 44922477.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77422949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252039 + ... + 252345.

It is an arithmetic number, because the mean of its divisors is an integer number (2212056).

Almost surely, 2^77422944 is an apocalyptic number.

77422944 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77422944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106178688).

77422944 is an abundant number, since it is smaller than the sum of its proper divisors (134934432).

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

77422944 is a wasteful number, since it uses less digits than its factorization.

77422944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 420 counting only the distinct ones).

The product of its digits is 112896, while the sum is 39.

The square root of 77422944 is about 8799.0308557250. The cubic root of 77422944 is about 426.2095995168.

The spelling of 77422944 in words is "seventy-seven million, four hundred twenty-two thousand, nine hundred forty-four".