1028726408 has 16 divisors (see below), whose sum is σ = 1975908060. Its totient is φ = 501817600.

The previous prime is 1028726401. The next prime is 1028726411. The reversal of 1028726408 is 8046278201.

It can be written as a sum of positive squares in 2 ways, for example, as 956170084 + 72556324 = 30922^2 + 8518^2 .

It is not an unprimeable number, because it can be changed into a prime (1028726401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1567853 + ... + 1568508.

Almost surely, 2^1028726408 is an apocalyptic number.

It is an amenable number.

1028726408 is a deficient number, since it is larger than the sum of its proper divisors (947181652).

1028726408 is a wasteful number, since it uses less digits than its factorization.

1028726408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136408 (or 3136404 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 1028726408 is about 32073.7651048330. The cubic root of 1028726408 is about 1009.4852155597.

The spelling of 1028726408 in words is "one billion, twenty-eight million, seven hundred twenty-six thousand, four hundred eight".