1028738978 has 16 divisors (see below), whose sum is σ = 1550776920. Its totient is φ = 511819776.

The previous prime is 1028738959. The next prime is 1028738993. The reversal of 1028738978 is 8798378201.

It can be written as a sum of positive squares in 4 ways, for example, as 223711849 + 805027129 = 14957^2 + 28373^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480326 + ... + 482462.

Almost surely, 2^1028738978 is an apocalyptic number.

1028738978 is a deficient number, since it is larger than the sum of its proper divisors (522037942).

1028738978 is a wasteful number, since it uses less digits than its factorization.

1028738978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 1028738978 is about 32073.9610587779. The cubic root of 1028738978 is about 1009.4893271736.

The spelling of 1028738978 in words is "one billion, twenty-eight million, seven hundred thirty-eight thousand, nine hundred seventy-eight".