801278381 has 16 divisors (see below), whose sum is σ = 848672640. Its totient is φ = 755415360.

The previous prime is 801278353. The next prime is 801278407. The reversal of 801278381 is 183872108.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801278381 is a prime.

It is a super-2 number, since 2×801278381² = 1284094087715962322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801278311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218495 + ... + 222131.

It is an arithmetic number, because the mean of its divisors is an integer number (53042040).

Almost surely, 2^801278381 is an apocalyptic number.

It is an amenable number.

801278381 is a deficient number, since it is larger than the sum of its proper divisors (47394259).

801278381 is a wasteful number, since it uses less digits than its factorization.

801278381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 801278381 is about 28306.8610234339. The cubic root of 801278381 is about 928.8119801501.

The spelling of 801278381 in words is "eight hundred one million, two hundred seventy-eight thousand, three hundred eighty-one".