270721891 has 24 divisors (see below), whose sum is σ = 314284320. Its totient is φ = 232552320.

The previous prime is 270721879. The next prime is 270721901. The reversal of 270721891 is 198127072.

It is not a de Polignac number, because 270721891 - 2¹⁵ = 270689123 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 270721891.

It is not an unprimeable number, because it can be changed into a prime (270721091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247141 + ... + 248233.

It is an arithmetic number, because the mean of its divisors is an integer number (13095180).

Almost surely, 2^270721891 is an apocalyptic number.

270721891 is a deficient number, since it is larger than the sum of its proper divisors (43562429).

270721891 is a wasteful number, since it uses less digits than its factorization.

270721891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 270721891 is about 16453.6285055911. The cubic root of 270721891 is about 646.9059192235.

The spelling of 270721891 in words is "two hundred seventy million, seven hundred twenty-one thousand, eight hundred ninety-one".