385890877 has 4 divisors (see below), whose sum is σ = 387576220. Its totient is φ = 384205536.

The previous prime is 385890853. The next prime is 385890881. The reversal of 385890877 is 778098583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183710916 + 202179961 = 13554^2 + 14219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385890877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385890377) 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 in 3 ways as a sum of consecutive naturals, for example, 842328 + ... + 842785.

It is an arithmetic number, because the mean of its divisors is an integer number (96894055).

Almost surely, 2^385890877 is an apocalyptic number.

It is an amenable number.

385890877 is a deficient number, since it is larger than the sum of its proper divisors (1685343).

385890877 is a wasteful number, since it uses less digits than its factorization.

385890877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685342.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The square root of 385890877 is about 19644.1054008575. The cubic root of 385890877 is about 728.0393229625.

The spelling of 385890877 in words is "three hundred eighty-five million, eight hundred ninety thousand, eight hundred seventy-seven".