1218750464 has 24 divisors (see below), whose sum is σ = 2436909930. Its totient is φ = 609374208.

The previous prime is 1218750457. The next prime is 1218750479. The reversal of 1218750464 is 4640578121.

It can be written as a sum of positive squares in only one way, i.e., 993510400 + 225240064 = 31520^2 + 15008^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295499 + ... + 299594.

Almost surely, 2^1218750464 is an apocalyptic number.

It is an amenable number.

1218750464 is a deficient number, since it is larger than the sum of its proper divisors (1218159466).

1218750464 is an frugal number, since it uses more digits than its factorization.

1218750464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595115 (or 595095 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1218750464 is about 34910.6067549678. The cubic root of 1218750464 is about 1068.1648059809.

The spelling of 1218750464 in words is "one billion, two hundred eighteen million, seven hundred fifty thousand, four hundred sixty-four".