378766645 has 24 divisors (see below), whose sum is σ = 480778200. Its totient is φ = 286404096.

The previous prime is 378766639. The next prime is 378766657. The reversal of 378766645 is 546667873.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 78818884 + 299947761 = 8878^2 + 17319^2 .

It is not a de Polignac number, because 378766645 - 2³ = 378766637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 378766592 and 378766601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234601 + ... + 236209.

It is an arithmetic number, because the mean of its divisors is an integer number (20032425).

Almost surely, 2^378766645 is an apocalyptic number.

It is an amenable number.

378766645 is a deficient number, since it is larger than the sum of its proper divisors (102011555).

378766645 is a wasteful number, since it uses less digits than its factorization.

378766645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1726 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 52.

The square root of 378766645 is about 19461.9280905053. The cubic root of 378766645 is about 723.5311649037.

It can be divided in two parts, 37876 and 6645, that added together give a square (44521 = 211²).

The spelling of 378766645 in words is "three hundred seventy-eight million, seven hundred sixty-six thousand, six hundred forty-five".