2297991428 has 6 divisors (see below), whose sum is σ = 4021485006. Its totient is φ = 1148995712.

The previous prime is 2297991379. The next prime is 2297991503. The reversal of 2297991428 is 8241997922.

It can be written as a sum of positive squares in only one way, i.e., 2159646784 + 138344644 = 46472^2 + 11762^2 .

It is a super-2 number, since 2×2297991428² = 10561529206322958368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2297991428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287248925 + ... + 287248932.

It is an arithmetic number, because the mean of its divisors is an integer number (670247501).

Almost surely, 2^2297991428 is an apocalyptic number.

It is an amenable number.

2297991428 is a deficient number, since it is larger than the sum of its proper divisors (1723493578).

2297991428 is a wasteful number, since it uses less digits than its factorization.

2297991428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574497861 (or 574497859 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 53.

The square root of 2297991428 is about 47937.3698485847. The cubic root of 2297991428 is about 1319.6217595488.

The spelling of 2297991428 in words is "two billion, two hundred ninety-seven million, nine hundred ninety-one thousand, four hundred twenty-eight".