8778381 has 8 divisors (see below), whose sum is σ = 11818560. Its totient is φ = 5795232.

The previous prime is 8778379. The next prime is 8778383. The reversal of 8778381 is 1838778.

8778381 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8778379) and next prime (8778383).

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

It is not a de Polignac number, because 8778381 - 2¹ = 8778379 is a prime.

It is a super-2 number, since 2×8778381² = 154119945962322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8778383) 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, 13896 + ... + 14513.

It is an arithmetic number, because the mean of its divisors is an integer number (1477320).

Almost surely, 2^8778381 is an apocalyptic number.

It is an amenable number.

8778381 is a deficient number, since it is larger than the sum of its proper divisors (3040179).

8778381 is a wasteful number, since it uses less digits than its factorization.

8778381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28515.

The product of its digits is 75264, while the sum is 42.

The square root of 8778381 is about 2962.8332723932. The cubic root of 8778381 is about 206.2868173025.

The spelling of 8778381 in words is "eight million, seven hundred seventy-eight thousand, three hundred eighty-one".