1038685988 has 6 divisors (see below), whose sum is σ = 1817700486. Its totient is φ = 519342992.

The previous prime is 1038685951. The next prime is 1038686071. The reversal of 1038685988 is 8895868301.

It can be written as a sum of positive squares in only one way, i.e., 1021313764 + 17372224 = 31958^2 + 4168^2 .

It is a super-2 number, since 2×1038685988² = 2157737163335072288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129835745 + ... + 129835752.

It is an arithmetic number, because the mean of its divisors is an integer number (302950081).

Almost surely, 2^1038685988 is an apocalyptic number.

It is an amenable number.

1038685988 is a deficient number, since it is larger than the sum of its proper divisors (779014498).

1038685988 is a wasteful number, since it uses less digits than its factorization.

1038685988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259671501 (or 259671499 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 56.

The square root of 1038685988 is about 32228.6516627674. The cubic root of 1038685988 is about 1012.7325241095.

The spelling of 1038685988 in words is "one billion, thirty-eight million, six hundred eighty-five thousand, nine hundred eighty-eight".