1023781250 has 42 divisors (see below), whose sum is σ = 1930229199. Its totient is φ = 407250000.

The previous prime is 1023781247. The next prime is 1023781261. The reversal of 1023781250 is 521873201.

It can be written as a sum of positive squares in 11 ways, for example, as 922154689 + 101626561 = 30367^2 + 10081^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=22625.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 5656160 + ... + 5656340.

Almost surely, 2^1023781250 is an apocalyptic number.

1023781250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1023781250 is a deficient number, since it is larger than the sum of its proper divisors (906447949).

1023781250 is an frugal number, since it uses more digits than its factorization.

1023781250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1023781250 is about 31996.5818486913. The cubic root of 1023781250 is about 1007.8650619582.

The spelling of 1023781250 in words is "one billion, twenty-three million, seven hundred eighty-one thousand, two hundred fifty".