378484821 has 48 divisors (see below), whose sum is σ = 680097600. Its totient is φ = 199272960.

The previous prime is 378484811. The next prime is 378484853. The reversal of 378484821 is 128484873.

It is not a de Polignac number, because 378484821 - 2¹³ = 378476629 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378484811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13230 + ... + 30528.

It is an arithmetic number, because the mean of its divisors is an integer number (14168700).

Almost surely, 2^378484821 is an apocalyptic number.

It is an amenable number.

378484821 is a deficient number, since it is larger than the sum of its proper divisors (301612779).

378484821 is a wasteful number, since it uses less digits than its factorization.

378484821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17346 (or 17343 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 378484821 is about 19454.6863505943. The cubic root of 378484821 is about 723.3516708856.

The spelling of 378484821 in words is "three hundred seventy-eight million, four hundred eighty-four thousand, eight hundred twenty-one".