764424538 has 4 divisors (see below), whose sum is σ = 1146636810. Its totient is φ = 382212268.

The previous prime is 764424469. The next prime is 764424539. The reversal of 764424538 is 835424467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835424467 = 1801 ⋅463867.

It can be written as a sum of positive squares in only one way, i.e., 530242729 + 234181809 = 23027^2 + 15303^2 .

It is a junction number, because it is equal to n+sod(n) for n = 764424494 and 764424503.

It is not an unprimeable number, because it can be changed into a prime (764424539) 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 as a sum of consecutive naturals, namely, 191106133 + ... + 191106136.

Almost surely, 2^764424538 is an apocalyptic number.

764424538 is a deficient number, since it is larger than the sum of its proper divisors (382212272).

764424538 is a wasteful number, since it uses less digits than its factorization.

764424538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382212271.

The product of its digits is 645120, while the sum is 43.

The square root of 764424538 is about 27648.2284785120. The cubic root of 764424538 is about 914.3480432466.

The spelling of 764424538 in words is "seven hundred sixty-four million, four hundred twenty-four thousand, five hundred thirty-eight".