1139520208 has 10 divisors (see below), whose sum is σ = 2207820434. Its totient is φ = 569760096.

The previous prime is 1139520163. The next prime is 1139520233. The reversal of 1139520208 is 8020259311.

It can be written as a sum of positive squares in only one way, i.e., 885181504 + 254338704 = 29752^2 + 15948^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1139520208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35609991 + ... + 35610022.

Almost surely, 2^1139520208 is an apocalyptic number.

It is an amenable number.

1139520208 is a deficient number, since it is larger than the sum of its proper divisors (1068300226).

1139520208 is an equidigital number, since it uses as much as digits as its factorization.

1139520208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71220021 (or 71220015 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1139520208 is about 33756.7801782101. The cubic root of 1139520208 is about 1044.4973531000.

Adding to 1139520208 its reverse (8020259311), we get a palindrome (9159779519).

The spelling of 1139520208 in words is "one billion, one hundred thirty-nine million, five hundred twenty thousand, two hundred eight".