77581432 has 16 divisors (see below), whose sum is σ = 145934640. Its totient is φ = 38665536.

The previous prime is 77581423. The next prime is 77581457. The reversal of 77581432 is 23418577.

It is a junction number, because it is equal to n+sod(n) for n = 77581391 and 77581400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12988 + ... + 17995.

It is an arithmetic number, because the mean of its divisors is an integer number (9120915).

Almost surely, 2^77581432 is an apocalyptic number.

It is an amenable number.

77581432 is a deficient number, since it is larger than the sum of its proper divisors (68353208).

77581432 is a wasteful number, since it uses less digits than its factorization.

77581432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31302 (or 31298 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 77581432 is about 8808.0322433561. The cubic root of 77581432 is about 426.5002242504.

The spelling of 77581432 in words is "seventy-seven million, five hundred eighty-one thousand, four hundred thirty-two".