1087398612 has 18 divisors (see below), whose sum is σ = 2748702138. Its totient is φ = 362466192.

The previous prime is 1087398607. The next prime is 1087398619. The reversal of 1087398612 is 2168937801.

It can be written as a sum of positive squares in only one way, i.e., 923916816 + 163481796 = 30396^2 + 12786^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087398619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15102723 + ... + 15102794.

Almost surely, 2^1087398612 is an apocalyptic number.

1087398612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1087398612 is an abundant number, since it is smaller than the sum of its proper divisors (1661303526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1087398612 is a wasteful number, since it uses less digits than its factorization.

1087398612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30205527 (or 30205522 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1087398612 is about 32975.7276189624. The cubic root of 1087398612 is about 1028.3230991442.

The spelling of 1087398612 in words is "one billion, eighty-seven million, three hundred ninety-eight thousand, six hundred twelve".