1098620159 has 24 divisors (see below), whose sum is σ = 1388574720. Its totient is φ = 850700448.

The previous prime is 1098620099. The next prime is 1098620177. The reversal of 1098620159 is 9510268901.

1098620159 = T₄₂ + T₄₃ + ... + T₁₈₇₄.

It is a happy number.

It is not a de Polignac number, because 1098620159 - 2²⁰ = 1097571583 is a prime.

It is a super-2 number, since 2×1098620159² = 2413932507522370562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098620059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45722 + ... + 65480.

It is an arithmetic number, because the mean of its divisors is an integer number (57857280).

Almost surely, 2^1098620159 is an apocalyptic number.

1098620159 is a deficient number, since it is larger than the sum of its proper divisors (289954561).

1098620159 is a wasteful number, since it uses less digits than its factorization.

1098620159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19839 (or 19826 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 1098620159 is about 33145.4394902225. The cubic root of 1098620159 is about 1031.8483038126.

It can be divided in two parts, 109 and 8620159, that added together give a palindrome (8620268).

The spelling of 1098620159 in words is "one billion, ninety-eight million, six hundred twenty thousand, one hundred fifty-nine".