1198378590 has 16 divisors (see below), whose sum is σ = 2876108688. Its totient is φ = 319567616.

The previous prime is 1198378579. The next prime is 1198378619. The reversal of 1198378590 is 958738911.

It is a super-2 number, since 2×1198378590² = 2872222489940776200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19972947 + ... + 19973006.

It is an arithmetic number, because the mean of its divisors is an integer number (179756793).

Almost surely, 2^1198378590 is an apocalyptic number.

1198378590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1198378590 is an abundant number, since it is smaller than the sum of its proper divisors (1677730098).

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

1198378590 is a wasteful number, since it uses less digits than its factorization.

1198378590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39945963.

The product of its (nonzero) digits is 544320, while the sum is 51.

The square root of 1198378590 is about 34617.6052031333. The cubic root of 1198378590 is about 1062.1797408935.

The spelling of 1198378590 in words is "one billion, one hundred ninety-eight million, three hundred seventy-eight thousand, five hundred ninety".