378728464 has 20 divisors (see below), whose sum is σ = 742033980. Its totient is φ = 187235840.

The previous prime is 378728461. The next prime is 378728489. The reversal of 378728464 is 464827873.

It can be written as a sum of positive squares in 2 ways, for example, as 75690000 + 303038464 = 8700^2 + 17408^2 .

It is not an unprimeable number, because it can be changed into a prime (378728461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131557 + ... + 134404.

It is an arithmetic number, because the mean of its divisors is an integer number (37101699).

Almost surely, 2^378728464 is an apocalyptic number.

It is an amenable number.

378728464 is a deficient number, since it is larger than the sum of its proper divisors (363305516).

378728464 is a wasteful number, since it uses less digits than its factorization.

378728464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266058 (or 266052 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 49.

The square root of 378728464 is about 19460.9471506399. The cubic root of 378728464 is about 723.5068525977.

The spelling of 378728464 in words is "three hundred seventy-eight million, seven hundred twenty-eight thousand, four hundred sixty-four".