378049685 has 16 divisors (see below), whose sum is σ = 488967024. Its totient is φ = 278940672.

The previous prime is 378049673. The next prime is 378049687. The reversal of 378049685 is 586940873.

It can be written as a sum of positive squares in 8 ways, for example, as 35688676 + 342361009 = 5974^2 + 18503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378049685 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378049687) 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, 132029 + ... + 134861.

It is an arithmetic number, because the mean of its divisors is an integer number (30560439).

Almost surely, 2^378049685 is an apocalyptic number.

It is an amenable number.

378049685 is a deficient number, since it is larger than the sum of its proper divisors (110917339).

378049685 is a wasteful number, since it uses less digits than its factorization.

378049685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4904.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 378049685 is about 19443.4998135624. The cubic root of 378049685 is about 723.0743572082.

The spelling of 378049685 in words is "three hundred seventy-eight million, forty-nine thousand, six hundred eighty-five".