3278787981 has 8 divisors (see below), whose sum is σ = 4996248384. Its totient is φ = 1873593120.

The previous prime is 3278787973. The next prime is 3278787997. The reversal of 3278787981 is 1897878723.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3278787981 - 2³ = 3278787973 is a prime.

It is a super-2 number, since 2×3278787981² = 21500901248700112722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3278787901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78066360 + ... + 78066401.

It is an arithmetic number, because the mean of its divisors is an integer number (624531048).

Almost surely, 2^3278787981 is an apocalyptic number.

It is an amenable number.

3278787981 is a deficient number, since it is larger than the sum of its proper divisors (1717460403).

3278787981 is a wasteful number, since it uses less digits than its factorization.

3278787981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156132771.

The product of its digits is 9483264, while the sum is 60.

The square root of 3278787981 is about 57260.7018905637. The cubic root of 3278787981 is about 1485.6087368148.

The spelling of 3278787981 in words is "three billion, two hundred seventy-eight million, seven hundred eighty-seven thousand, nine hundred eighty-one".