378657730 has 16 divisors (see below), whose sum is σ = 743546304. Its totient is φ = 137693680.

The previous prime is 378657661. The next prime is 378657733. The reversal of 378657730 is 37756873.

It is not an unprimeable number, because it can be changed into a prime (378657733) 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, 1721062 + ... + 1721281.

It is an arithmetic number, because the mean of its divisors is an integer number (46471644).

Almost surely, 2^378657730 is an apocalyptic number.

378657730 is a deficient number, since it is larger than the sum of its proper divisors (364888574).

378657730 is a wasteful number, since it uses less digits than its factorization.

378657730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442361.

The product of its (nonzero) digits is 740880, while the sum is 46.

The square root of 378657730 is about 19459.1297338807. The cubic root of 378657730 is about 723.4618073785.

It can be divided in two parts, 3786 and 57730, that added together give a palindrome (61516).

The spelling of 378657730 in words is "three hundred seventy-eight million, six hundred fifty-seven thousand, seven hundred thirty".