2271990864 has 120 divisors (see below), whose sum is σ = 6947881696. Its totient is φ = 635500800.

The previous prime is 2271990839. The next prime is 2271990881. The reversal of 2271990864 is 4680991722.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60459 + ... + 90549.

Almost surely, 2^2271990864 is an apocalyptic number.

2271990864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2271990864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3473940848).

2271990864 is an abundant number, since it is smaller than the sum of its proper divisors (4675890832).

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

2271990864 is a wasteful number, since it uses less digits than its factorization.

2271990864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30137 (or 30120 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 2271990864 is about 47665.4053166445. The cubic root of 2271990864 is about 1314.6259281913.

The spelling of 2271990864 in words is "two billion, two hundred seventy-one million, nine hundred ninety thousand, eight hundred sixty-four".