1918277252 has 6 divisors (see below), whose sum is σ = 3356985198. Its totient is φ = 959138624.

The previous prime is 1918277243. The next prime is 1918277269. The reversal of 1918277252 is 2527728191.

It can be written as a sum of positive squares in only one way, i.e., 1738556416 + 179720836 = 41696^2 + 13406^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239784653 + ... + 239784660.

It is an arithmetic number, because the mean of its divisors is an integer number (559497533).

Almost surely, 2^1918277252 is an apocalyptic number.

It is an amenable number.

1918277252 is a deficient number, since it is larger than the sum of its proper divisors (1438707946).

1918277252 is a wasteful number, since it uses less digits than its factorization.

1918277252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479569317 (or 479569315 counting only the distinct ones).

The product of its digits is 141120, while the sum is 44.

The square root of 1918277252 is about 43798.1421067150. The cubic root of 1918277252 is about 1242.5211565207.

The spelling of 1918277252 in words is "one billion, nine hundred eighteen million, two hundred seventy-seven thousand, two hundred fifty-two".