77147432 has 32 divisors (see below), whose sum is σ = 148149000. Its totient is φ = 37651200.

The previous prime is 77147431. The next prime is 77147443. The reversal of 77147432 is 23474177.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34975396 + 42172036 = 5914^2 + 6494^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77147392 and 77147401.

It is not an unprimeable number, because it can be changed into a prime (77147431) 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 7 ways as a sum of consecutive naturals, for example, 72182 + ... + 73242.

Almost surely, 2^77147432 is an apocalyptic number.

It is an amenable number.

77147432 is a deficient number, since it is larger than the sum of its proper divisors (71001568).

77147432 is a wasteful number, since it uses less digits than its factorization.

77147432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1273 counting only the distinct ones).

The product of its digits is 32928, while the sum is 35.

The square root of 77147432 is about 8783.3610878752. The cubic root of 77147432 is about 425.7034385220.

The spelling of 77147432 in words is "seventy-seven million, one hundred forty-seven thousand, four hundred thirty-two".