387040769 has 4 divisors (see below), whose sum is σ = 388095744. Its totient is φ = 385985796.

The previous prime is 387040763. The next prime is 387040777. The reversal of 387040769 is 967040783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 967040783 = 463 ⋅2088641.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387040769 is a prime.

It is a super-2 number, since 2×387040769² = 299601113736222722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387040763) 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 3 ways as a sum of consecutive naturals, for example, 526937 + ... + 527670.

It is an arithmetic number, because the mean of its divisors is an integer number (97023936).

Almost surely, 2^387040769 is an apocalyptic number.

It is an amenable number.

387040769 is a deficient number, since it is larger than the sum of its proper divisors (1054975).

387040769 is a wasteful number, since it uses less digits than its factorization.

387040769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054974.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 387040769 is about 19673.3517479864. The cubic root of 387040769 is about 728.7617520884.

The spelling of 387040769 in words is "three hundred eighty-seven million, forty thousand, seven hundred sixty-nine".