77228146 has 4 divisors (see below), whose sum is σ = 115842222. Its totient is φ = 38614072.

The previous prime is 77228117. The next prime is 77228149. The reversal of 77228146 is 64182277.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56625625 + 20602521 = 7525^2 + 4539^2 .

It is not an unprimeable number, because it can be changed into a prime (77228149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19307035 + ... + 19307038.

Almost surely, 2^77228146 is an apocalyptic number.

77228146 is a deficient number, since it is larger than the sum of its proper divisors (38614076).

77228146 is a wasteful number, since it uses less digits than its factorization.

77228146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38614075.

The product of its digits is 37632, while the sum is 37.

The square root of 77228146 is about 8787.9545970607. The cubic root of 77228146 is about 425.8518480909.

The spelling of 77228146 in words is "seventy-seven million, two hundred twenty-eight thousand, one hundred forty-six".