77228352 has 42 divisors (see below), whose sum is σ = 221362778. Its totient is φ = 25742592.

The previous prime is 77228341. The next prime is 77228357. The reversal of 77228352 is 25382277.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77158656 + 69696 = 8784^2 + 264^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77228357) 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, 66463 + ... + 67614.

Almost surely, 2^77228352 is an apocalyptic number.

77228352 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

77228352 is an abundant number, since it is smaller than the sum of its proper divisors (144134426).

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

77228352 is a wasteful number, since it uses less digits than its factorization.

77228352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134095 (or 134082 counting only the distinct ones).

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

The square root of 77228352 is about 8787.9663176414. The cubic root of 77228352 is about 425.8522267327.

The spelling of 77228352 in words is "seventy-seven million, two hundred twenty-eight thousand, three hundred fifty-two".