764077738 has 4 divisors (see below), whose sum is σ = 1146116610. Its totient is φ = 382038868.

The previous prime is 764077679. The next prime is 764077747. The reversal of 764077738 is 837770467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 837770467 = 809 ⋅1035563.

It can be written as a sum of positive squares in only one way, i.e., 532824889 + 231252849 = 23083^2 + 15207^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 764077691 and 764077700.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191019433 + ... + 191019436.

Almost surely, 2^764077738 is an apocalyptic number.

764077738 is a deficient number, since it is larger than the sum of its proper divisors (382038872).

764077738 is a wasteful number, since it uses less digits than its factorization.

764077738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382038871.

The product of its (nonzero) digits is 1382976, while the sum is 49.

The square root of 764077738 is about 27641.9561174675. The cubic root of 764077738 is about 914.2097501688.

The spelling of 764077738 in words is "seven hundred sixty-four million, seventy-seven thousand, seven hundred thirty-eight".