378765615 has 16 divisors (see below), whose sum is σ = 606469248. Its totient is φ = 201860256.

The previous prime is 378765601. The next prime is 378765619. The reversal of 378765615 is 516567873.

It is not a de Polignac number, because 378765615 - 2⁹ = 378765103 is a prime.

It is a super-2 number, since 2×378765615² = 286926782212656450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378765619) 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, 13732 + ... + 30758.

It is an arithmetic number, because the mean of its divisors is an integer number (37904328).

Almost surely, 2^378765615 is an apocalyptic number.

378765615 is a deficient number, since it is larger than the sum of its proper divisors (227703633).

378765615 is a wasteful number, since it uses less digits than its factorization.

378765615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18518.

The product of its digits is 1058400, while the sum is 48.

The square root of 378765615 is about 19461.9016285665. The cubic root of 378765615 is about 723.5305090577.

The spelling of 378765615 in words is "three hundred seventy-eight million, seven hundred sixty-five thousand, six hundred fifteen".