77838489 has 24 divisors (see below), whose sum is σ = 120370432. Its totient is φ = 50213520.

The previous prime is 77838487. The next prime is 77838493. The reversal of 77838489 is 98483877.

It is not a de Polignac number, because 77838489 - 2¹ = 77838487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77838487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2367 + ... + 12699.

Almost surely, 2^77838489 is an apocalyptic number.

It is an amenable number.

77838489 is a deficient number, since it is larger than the sum of its proper divisors (42531943).

77838489 is a wasteful number, since it uses less digits than its factorization.

77838489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10379 (or 10367 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 77838489 is about 8822.6123682275. The cubic root of 77838489 is about 426.9707578144.

The spelling of 77838489 in words is "seventy-seven million, eight hundred thirty-eight thousand, four hundred eighty-nine".