77127432 has 32 divisors (see below), whose sum is σ = 193829280. Its totient is φ = 25574400.

The previous prime is 77127409. The next prime is 77127439. The reversal of 77127432 is 23472177.

It is a junction number, because it is equal to n+sod(n) for n = 77127393 and 77127402.

It is not an unprimeable number, because it can be changed into a prime (77127439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3694 + ... + 12957.

It is an arithmetic number, because the mean of its divisors is an integer number (6057165).

Almost surely, 2^77127432 is an apocalyptic number.

It is an amenable number.

77127432 is an abundant number, since it is smaller than the sum of its proper divisors (116701848).

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

77127432 is a wasteful number, since it uses less digits than its factorization.

77127432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16853 (or 16849 counting only the distinct ones).

The product of its digits is 16464, while the sum is 33.

The square root of 77127432 is about 8782.2224977508. Note that the first 3 decimals coincide. The cubic root of 77127432 is about 425.6666483381. Note that the first 4 decimals are identical.

It can be divided in two parts, 771 and 27432, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 77127432 in words is "seventy-seven million, one hundred twenty-seven thousand, four hundred thirty-two".