1238992085 has 8 divisors (see below), whose sum is σ = 1538059320. Its totient is φ = 957014464.

The previous prime is 1238992081. The next prime is 1238992087. The reversal of 1238992085 is 5802998321.

It can be written as a sum of positive squares in 4 ways, for example, as 2696164 + 1236295921 = 1642^2 + 35161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1238992085 - 2² = 1238992081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238992081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4272242 + ... + 4272531.

It is an arithmetic number, because the mean of its divisors is an integer number (192257415).

Almost surely, 2^1238992085 is an apocalyptic number.

It is an amenable number.

1238992085 is a deficient number, since it is larger than the sum of its proper divisors (299067235).

1238992085 is an equidigital number, since it uses as much as digits as its factorization.

1238992085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8544807.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1238992085 is about 35199.3193826244. The cubic root of 1238992085 is about 1074.0459059428.

The spelling of 1238992085 in words is "one billion, two hundred thirty-eight million, nine hundred ninety-two thousand, eighty-five".