1098261857 has 8 divisors (see below), whose sum is σ = 1369261632. Its totient is φ = 855788400.

The previous prime is 1098261847. The next prime is 1098261881. The reversal of 1098261857 is 7581628901.

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 1098261857 - 2¹⁶ = 1098196321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098261817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7131494 + ... + 7131647.

It is an arithmetic number, because the mean of its divisors is an integer number (171157704).

Almost surely, 2^1098261857 is an apocalyptic number.

It is an amenable number.

1098261857 is a deficient number, since it is larger than the sum of its proper divisors (270999775).

1098261857 is a wasteful number, since it uses less digits than its factorization.

1098261857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14263159.

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 1098261857 is about 33140.0340524870. The cubic root of 1098261857 is about 1031.7361165664.

The spelling of 1098261857 in words is "one billion, ninety-eight million, two hundred sixty-one thousand, eight hundred fifty-seven".