2291386952 has 8 divisors (see below), whose sum is σ = 4296350550. Its totient is φ = 1145693472.

The previous prime is 2291386943. The next prime is 2291386957. The reversal of 2291386952 is 2596831922.

It can be written as a sum of positive squares in only one way, i.e., 1491967876 + 799419076 = 38626^2 + 28274^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2291386897 and 2291386906.

It is not an unprimeable number, because it can be changed into a prime (2291386957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143211677 + ... + 143211692.

Almost surely, 2^2291386952 is an apocalyptic number.

It is an amenable number.

2291386952 is a deficient number, since it is larger than the sum of its proper divisors (2004963598).

2291386952 is a wasteful number, since it uses less digits than its factorization.

2291386952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286423375 (or 286423371 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 2291386952 is about 47868.4337742525. The cubic root of 2291386952 is about 1318.3563395367.

The spelling of 2291386952 in words is "two billion, two hundred ninety-one million, three hundred eighty-six thousand, nine hundred fifty-two".