1211730190 has 32 divisors (see below), whose sum is σ = 2383486560. Its totient is φ = 439872000.

The previous prime is 1211730181. The next prime is 1211730193. The reversal of 1211730190 is 910371121.

It is a super-2 number, since 2×1211730190² = 2936580106714872200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211730193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56946 + ... + 75274.

It is an arithmetic number, because the mean of its divisors is an integer number (74483955).

Almost surely, 2^1211730190 is an apocalyptic number.

1211730190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211730190 is a deficient number, since it is larger than the sum of its proper divisors (1171756370).

1211730190 is a wasteful number, since it uses less digits than its factorization.

1211730190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18948.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 1211730190 is about 34809.9151104969. The cubic root of 1211730190 is about 1066.1098996481.

The spelling of 1211730190 in words is "one billion, two hundred eleven million, seven hundred thirty thousand, one hundred ninety".