77285898 has 24 divisors (see below), whose sum is σ = 168939108. Its totient is φ = 25533312.

The previous prime is 77285891. The next prime is 77285941. The reversal of 77285898 is 89858277.

It can be written as a sum of positive squares in 2 ways, for example, as 77211369 + 74529 = 8787^2 + 273^2 .

It is a super-2 number, since 2×77285898² = 11946220059332808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77285891) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 16965 + ... + 21032.

Almost surely, 2^77285898 is an apocalyptic number.

77285898 is an abundant number, since it is smaller than the sum of its proper divisors (91653210).

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

77285898 is a wasteful number, since it uses less digits than its factorization.

77285898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38118 (or 38115 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 77285898 is about 8791.2398442996. The cubic root of 77285898 is about 425.9579737686.

The spelling of 77285898 in words is "seventy-seven million, two hundred eighty-five thousand, eight hundred ninety-eight".