1098815858 has 16 divisors (see below), whose sum is σ = 1948639680. Its totient is φ = 454682256.

The previous prime is 1098815857. The next prime is 1098815881. The reversal of 1098815858 is 8585188901.

It is not an unprimeable number, because it can be changed into a prime (1098815857) 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, 1352816 + ... + 1353627.

It is an arithmetic number, because the mean of its divisors is an integer number (121789980).

Almost surely, 2^1098815858 is an apocalyptic number.

1098815858 is a deficient number, since it is larger than the sum of its proper divisors (849823822).

1098815858 is a wasteful number, since it uses less digits than its factorization.

1098815858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706481.

The product of its (nonzero) digits is 921600, while the sum is 53.

The square root of 1098815858 is about 33148.3914843541. The cubic root of 1098815858 is about 1031.9095684486.

The spelling of 1098815858 in words is "one billion, ninety-eight million, eight hundred fifteen thousand, eight hundred fifty-eight".