80726381 has 8 divisors (see below), whose sum is σ = 82457760. Its totient is φ = 79013232.

The previous prime is 80726333. The next prime is 80726411. The reversal of 80726381 is 18362708.

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 80726381 - 2¹⁴ = 80709997 is a prime.

It is a super-2 number, since 2×80726381² = 13033497178714322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80722381) 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, 4586 + ... + 13508.

It is an arithmetic number, because the mean of its divisors is an integer number (10307220).

Almost surely, 2^80726381 is an apocalyptic number.

It is an amenable number.

80726381 is a deficient number, since it is larger than the sum of its proper divisors (1731379).

80726381 is a wasteful number, since it uses less digits than its factorization.

80726381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9115.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 80726381 is about 8984.7860853779. The cubic root of 80726381 is about 432.1871277929.

The spelling of 80726381 in words is "eighty million, seven hundred twenty-six thousand, three hundred eighty-one".