378211730 has 64 divisors (see below), whose sum is σ = 751252320. Its totient is φ = 136249344.

The previous prime is 378211727. The next prime is 378211741. The reversal of 378211730 is 37112873.

It can be written as a sum of positive squares in 16 ways, for example, as 12752041 + 365459689 = 3571^2 + 19117^2 .

It is a super-2 number, since 2×378211730² = 286088225419185800, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 1122122 + ... + 1122458.

Almost surely, 2^378211730 is an apocalyptic number.

378211730 is a deficient number, since it is larger than the sum of its proper divisors (373040590).

378211730 is a wasteful number, since it uses less digits than its factorization.

378211730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 378211730 is about 19447.6664409898. Note that the first 3 decimals coincide. The cubic root of 378211730 is about 723.1776539015.

The spelling of 378211730 in words is "three hundred seventy-eight million, two hundred eleven thousand, seven hundred thirty".