77854122 has 40 divisors (see below), whose sum is σ = 176091300. Its totient is φ = 25707456.

The previous prime is 77854109. The next prime is 77854151. The reversal of 77854122 is 22145877.

It can be written as a sum of positive squares in 2 ways, for example, as 76055841 + 1798281 = 8721^2 + 1341^2 .

It is a super-2 number, since 2×77854122² = 12122528624781768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15454 + ... + 19862.

Almost surely, 2^77854122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77854122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88045650).

77854122 is an abundant number, since it is smaller than the sum of its proper divisors (98237178).

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

77854122 is a wasteful number, since it uses less digits than its factorization.

77854122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532 (or 4523 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 77854122 is about 8823.4982858275. The cubic root of 77854122 is about 426.9993400199. Note that the first 3 decimals are identical.

Adding to 77854122 its reverse (22145877), we get a palindrome (99999999).

The spelling of 77854122 in words is "seventy-seven million, eight hundred fifty-four thousand, one hundred twenty-two".