1215930190 has 16 divisors (see below), whose sum is σ = 2283834528. Its totient is φ = 465225376.

The previous prime is 1215930169. The next prime is 1215930203. The reversal of 1215930190 is 910395121.

It is a happy number.

It is a super-2 number, since 2×1215930190² = 2956972453906872200, 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2643097 + ... + 2643556.

It is an arithmetic number, because the mean of its divisors is an integer number (142739658).

Almost surely, 2^1215930190 is an apocalyptic number.

1215930190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215930190 is a deficient number, since it is larger than the sum of its proper divisors (1067904338).

1215930190 is a wasteful number, since it uses less digits than its factorization.

1215930190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286683.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 1215930190 is about 34870.1905644348. The cubic root of 1215930190 is about 1067.3402335366.

The spelling of 1215930190 in words is "one billion, two hundred fifteen million, nine hundred thirty thousand, one hundred ninety".