378651820 has 24 divisors (see below), whose sum is σ = 795556944. Its totient is φ = 151386816.

The previous prime is 378651809. The next prime is 378651841. The reversal of 378651820 is 28156873.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58254 + ... + 64426.

It is an arithmetic number, because the mean of its divisors is an integer number (33148206).

Almost surely, 2^378651820 is an apocalyptic number.

It is an amenable number.

378651820 is an abundant number, since it is smaller than the sum of its proper divisors (416905124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

378651820 is a wasteful number, since it uses less digits than its factorization.

378651820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9249 (or 9247 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 378651820 is about 19458.9778765484. The cubic root of 378651820 is about 723.4580434855.

The spelling of 378651820 in words is "three hundred seventy-eight million, six hundred fifty-one thousand, eight hundred twenty".