1098491938 has 8 divisors (see below), whose sum is σ = 1648806300. Its totient is φ = 548889840.

The previous prime is 1098491917. The next prime is 1098491959. The reversal of 1098491938 is 8391948901.

It is an interprime number because it is at equal distance from previous prime (1098491917) and next prime (1098491959).

It can be written as a sum of positive squares in 2 ways, for example, as 1098458449 + 33489 = 33143^2 + 183^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174193 + ... + 180388.

Almost surely, 2^1098491938 is an apocalyptic number.

1098491938 is a deficient number, since it is larger than the sum of its proper divisors (550314362).

1098491938 is a wasteful number, since it uses less digits than its factorization.

1098491938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356132.

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 1098491938 is about 33143.5052159545. The cubic root of 1098491938 is about 1031.8081595863.

The spelling of 1098491938 in words is "one billion, ninety-eight million, four hundred ninety-one thousand, nine hundred thirty-eight".