387902789 has 8 divisors (see below), whose sum is σ = 390149760. Its totient is φ = 385662816.

The previous prime is 387902777. The next prime is 387902791. The reversal of 387902789 is 987209783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 387902789 - 2⁴ = 387902773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387902789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387902989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140777 + ... + 143505.

It is an arithmetic number, because the mean of its divisors is an integer number (48768720).

Almost surely, 2^387902789 is an apocalyptic number.

It is an amenable number.

387902789 is a deficient number, since it is larger than the sum of its proper divisors (2246971).

387902789 is a wasteful number, since it uses less digits than its factorization.

387902789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 387902789 is about 19695.2478786127. The cubic root of 387902789 is about 729.3023854011.

The spelling of 387902789 in words is "three hundred eighty-seven million, nine hundred two thousand, seven hundred eighty-nine".