77441652 has 18 divisors (see below), whose sum is σ = 195755378. Its totient is φ = 25813872.

The previous prime is 77441641. The next prime is 77441653. The reversal of 77441652 is 25614477.

It can be written as a sum of positive squares in only one way, i.e., 70660836 + 6780816 = 8406^2 + 2604^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2151157 = 77441652 / (7 + 7 + 4 + 4 + 1 + 6 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77441653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1075543 + ... + 1075614.

Almost surely, 2^77441652 is an apocalyptic number.

It is an amenable number.

77441652 is an abundant number, since it is smaller than the sum of its proper divisors (118313726).

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

77441652 is a wasteful number, since it uses less digits than its factorization.

77441652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151167 (or 2151162 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 77441652 is about 8800.0938631358. The cubic root of 77441652 is about 426.2439256336.

The spelling of 77441652 in words is "seventy-seven million, four hundred forty-one thousand, six hundred fifty-two".