1030725778 has 4 divisors (see below), whose sum is σ = 1546088670. Its totient is φ = 515362888.

The previous prime is 1030725769. The next prime is 1030725797. The reversal of 1030725778 is 8775270301.

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., 1030217409 + 508369 = 32097^2 + 713^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1030725778.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257681443 + ... + 257681446.

Almost surely, 2^1030725778 is an apocalyptic number.

1030725778 is a deficient number, since it is larger than the sum of its proper divisors (515362892).

1030725778 is an equidigital number, since it uses as much as digits as its factorization.

1030725778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515362891.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 1030725778 is about 32104.9182836524. The cubic root of 1030725778 is about 1010.1387836607.

The spelling of 1030725778 in words is "one billion, thirty million, seven hundred twenty-five thousand, seven hundred seventy-eight".