378781420 has 24 divisors (see below), whose sum is σ = 842232384. Its totient is φ = 142599936.

The previous prime is 378781349. The next prime is 378781427. The reversal of 378781420 is 24187873.

It is not an unprimeable number, because it can be changed into a prime (378781427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556692 + ... + 557371.

It is an arithmetic number, because the mean of its divisors is an integer number (35093016).

Almost surely, 2^378781420 is an apocalyptic number.

It is an amenable number.

378781420 is an abundant number, since it is smaller than the sum of its proper divisors (463450964).

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

378781420 is a wasteful number, since it uses less digits than its factorization.

378781420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114089 (or 1114087 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 378781420 is about 19462.3076740658. The cubic root of 378781420 is about 723.5405726609.

The spelling of 378781420 in words is "three hundred seventy-eight million, seven hundred eighty-one thousand, four hundred twenty".