80911398 has 32 divisors (see below), whose sum is σ = 172008576. Its totient is φ = 25285248.

The previous prime is 80911373. The next prime is 80911427. The reversal of 80911398 is 89311908.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27465 + ... + 30267.

It is an arithmetic number, because the mean of its divisors is an integer number (5375268).

Almost surely, 2^80911398 is an apocalyptic number.

80911398 is an abundant number, since it is smaller than the sum of its proper divisors (91097178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80911398 is a wasteful number, since it uses less digits than its factorization.

80911398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 80911398 is about 8995.0763198541. The cubic root of 80911398 is about 432.5170527986.

The spelling of 80911398 in words is "eighty million, nine hundred eleven thousand, three hundred ninety-eight".