378813765 has 16 divisors (see below), whose sum is σ = 661202496. Its totient is φ = 183667200.

The previous prime is 378813761. The next prime is 378813767. The reversal of 378813765 is 567318873.

It is not a de Polignac number, because 378813765 - 2² = 378813761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378813761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1147756 + ... + 1148085.

It is an arithmetic number, because the mean of its divisors is an integer number (41325156).

Almost surely, 2^378813765 is an apocalyptic number.

It is an amenable number.

378813765 is a deficient number, since it is larger than the sum of its proper divisors (282388731).

378813765 is a wasteful number, since it uses less digits than its factorization.

378813765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295860.

The product of its digits is 846720, while the sum is 48.

The square root of 378813765 is about 19463.1386215071. The cubic root of 378813765 is about 723.5611669954.

The spelling of 378813765 in words is "three hundred seventy-eight million, eight hundred thirteen thousand, seven hundred sixty-five".