378532881 has 6 divisors (see below), whose sum is σ = 546769730. Its totient is φ = 252355248.

The previous prime is 378532859. The next prime is 378532883. The reversal of 378532881 is 188235873.

378532881 is a `hidden beast` number, since 37 + 8 + 532 + 8 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 317552400 + 60980481 = 17820^2 + 7809^2 .

It is not a de Polignac number, because 378532881 - 2⁹ = 378532369 is a prime.

It is a super-2 number, since 2×378532881² = 286574283996320322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378532883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21029596 + ... + 21029613.

Almost surely, 2^378532881 is an apocalyptic number.

It is an amenable number.

378532881 is a deficient number, since it is larger than the sum of its proper divisors (168236849).

378532881 is a wasteful number, since it uses less digits than its factorization.

378532881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42059215 (or 42059212 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 378532881 is about 19455.9214893564. The cubic root of 378532881 is about 723.3822866532.

The spelling of 378532881 in words is "three hundred seventy-eight million, five hundred thirty-two thousand, eight hundred eighty-one".