77221352 has 16 divisors (see below), whose sum is σ = 155927940. Its totient is φ = 35640576.

The previous prime is 77221351. The next prime is 77221367. The reversal of 77221352 is 25312277.

It can be written as a sum of positive squares in 2 ways, for example, as 77193796 + 27556 = 8786^2 + 166^2 .

It is not an unprimeable number, because it can be changed into a prime (77221351) 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 3 ways as a sum of consecutive naturals, for example, 371153 + ... + 371360.

Almost surely, 2^77221352 is an apocalyptic number.

It is an amenable number.

77221352 is an abundant number, since it is smaller than the sum of its proper divisors (78706588).

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

77221352 is a wasteful number, since it uses less digits than its factorization.

77221352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742532 (or 742528 counting only the distinct ones).

The product of its digits is 5880, while the sum is 29.

The square root of 77221352 is about 8787.5680367210. The cubic root of 77221352 is about 425.8393598879.

The spelling of 77221352 in words is "seventy-seven million, two hundred twenty-one thousand, three hundred fifty-two".