77220296 has 8 divisors (see below), whose sum is σ = 144788070. Its totient is φ = 38610144.

The previous prime is 77220289. The next prime is 77220317. The reversal of 77220296 is 69202277.

It can be written as a sum of positive squares in only one way, i.e., 66422500 + 10797796 = 8150^2 + 3286^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×77220296² = 11925948228655232, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4826261 + ... + 4826276.

Almost surely, 2^77220296 is an apocalyptic number.

It is an amenable number.

77220296 is a deficient number, since it is larger than the sum of its proper divisors (67567774).

77220296 is a wasteful number, since it uses less digits than its factorization.

77220296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652543 (or 9652539 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 77220296 is about 8787.5079516322. The cubic root of 77220296 is about 425.8374187649.

The spelling of 77220296 in words is "seventy-seven million, two hundred twenty thousand, two hundred ninety-six".