814928381 has 8 divisors (see below), whose sum is σ = 821012544. Its totient is φ = 808867360.

The previous prime is 814928357. The next prime is 814928399. The reversal of 814928381 is 183829418.

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

It is a cyclic number.

It is not a de Polignac number, because 814928381 - 2²⁶ = 747819517 is a prime.

It is a super-2 number, since 2×814928381² = 1328216532318562322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814928321) 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, 68390 + ... + 79416.

It is an arithmetic number, because the mean of its divisors is an integer number (102626568).

Almost surely, 2^814928381 is an apocalyptic number.

It is an amenable number.

814928381 is a deficient number, since it is larger than the sum of its proper divisors (6084163).

814928381 is a wasteful number, since it uses less digits than its factorization.

814928381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11571.

The product of its digits is 110592, while the sum is 44.

The square root of 814928381 is about 28546.9504676069. The cubic root of 814928381 is about 934.0565014186.

The spelling of 814928381 in words is "eight hundred fourteen million, nine hundred twenty-eight thousand, three hundred eighty-one".