77432 has 8 divisors (see below), whose sum is σ = 145200. Its totient is φ = 38712.

The previous prime is 77431. The next prime is 77447. The reversal of 77432 is 23477.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 77398 and 77407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832 + ... + 4847.

It is an arithmetic number, because the mean of its divisors is an integer number (18150).

2⁷⁷⁴³² is an apocalyptic number.

It is an amenable number.

77432 is a deficient number, since it is larger than the sum of its proper divisors (67768).

77432 is a wasteful number, since it uses less digits than its factorization.

77432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9685 (or 9681 counting only the distinct ones).

The product of its digits is 1176, while the sum is 23.

The square root of 77432 is about 278.2660597342. The cubic root of 77432 is about 42.6226216484.

The spelling of 77432 in words is "seventy-seven thousand, four hundred thirty-two".