77743332 has 18 divisors (see below), whose sum is σ = 196517958. Its totient is φ = 25914432.

The previous prime is 77743279. The next prime is 77743333. The reversal of 77743332 is 23334777.

It can be written as a sum of positive squares in only one way, i.e., 76317696 + 1425636 = 8736^2 + 1194^2 .

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: 2159537 = 77743332 / (7 + 7 + 7 + 4 + 3 + 3 + 3 + 2).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (77743333) 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, 1079733 + ... + 1079804.

Almost surely, 2^77743332 is an apocalyptic number.

It is an amenable number.

77743332 is an abundant number, since it is smaller than the sum of its proper divisors (118774626).

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

77743332 is a wasteful number, since it uses less digits than its factorization.

77743332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159547 (or 2159542 counting only the distinct ones).

The product of its digits is 74088, while the sum is 36.

The square root of 77743332 is about 8817.2179285759. The cubic root of 77743332 is about 426.7966972928.

The spelling of 77743332 in words is "seventy-seven million, seven hundred forty-three thousand, three hundred thirty-two".