378211728 has 20 divisors (see below), whose sum is σ = 977047088. Its totient is φ = 126070560.

The previous prime is 378211727. The next prime is 378211741. The reversal of 378211728 is 827112873.

It is a super-2 number, since 2×378211728² = 286088222393491968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378211727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3939658 + ... + 3939753.

Almost surely, 2^378211728 is an apocalyptic number.

It is an amenable number.

378211728 is an abundant number, since it is smaller than the sum of its proper divisors (598835360).

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

378211728 is a wasteful number, since it uses less digits than its factorization.

378211728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7879422 (or 7879416 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 378211728 is about 19447.6663895697. Note that the first 3 decimals coincide. The cubic root of 378211728 is about 723.1776526267.

The spelling of 378211728 in words is "three hundred seventy-eight million, two hundred eleven thousand, seven hundred twenty-eight".