89378261 has 16 divisors (see below), whose sum is σ = 111235200. Its totient is φ = 70072128.

The previous prime is 89378257. The next prime is 89378281. The reversal of 89378261 is 16287398.

It is not a de Polignac number, because 89378261 - 2² = 89378257 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89378221) 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, 7730 + ... + 15443.

It is an arithmetic number, because the mean of its divisors is an integer number (6952200).

Almost surely, 2^89378261 is an apocalyptic number.

It is an amenable number.

89378261 is a deficient number, since it is larger than the sum of its proper divisors (21856939).

89378261 is a wasteful number, since it uses less digits than its factorization.

89378261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23228.

The product of its digits is 145152, while the sum is 44.

The square root of 89378261 is about 9454.0076687085. The cubic root of 89378261 is about 447.1061395160.

The spelling of 89378261 in words is "eighty-nine million, three hundred seventy-eight thousand, two hundred sixty-one".