2249727778 has 4 divisors (see below), whose sum is σ = 3374591670. Its totient is φ = 1124863888.

The previous prime is 2249727749. The next prime is 2249727791. The reversal of 2249727778 is 8777279422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1986217489 + 263510289 = 44567^2 + 16233^2 .

It is a super-2 number, since 2×2249727778² = 10122550150209634568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562431943 + ... + 562431946.

Almost surely, 2^2249727778 is an apocalyptic number.

2249727778 is a deficient number, since it is larger than the sum of its proper divisors (1124863892).

2249727778 is a wasteful number, since it uses less digits than its factorization.

2249727778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124863891.

The product of its digits is 5531904, while the sum is 55.

The square root of 2249727778 is about 47431.2953438972. The cubic root of 2249727778 is about 1310.3178487906.

The spelling of 2249727778 in words is "two billion, two hundred forty-nine million, seven hundred twenty-seven thousand, seven hundred seventy-eight".