1211092940 has 24 divisors (see below), whose sum is σ = 2544479952. Its totient is φ = 484211520.

The previous prime is 1211092931. The next prime is 1211092951. The reversal of 1211092940 is 492901121.

It is a super-2 number, since 2×1211092940² = 2933492218635687200, which contains 22 as substring.

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, 33887 + ... + 59753.

It is an arithmetic number, because the mean of its divisors is an integer number (106019998).

Almost surely, 2^1211092940 is an apocalyptic number.

1211092940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211092940 is an abundant number, since it is smaller than the sum of its proper divisors (1333387012).

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

1211092940 is a wasteful number, since it uses less digits than its factorization.

1211092940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28217 (or 28215 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1211092940 is about 34800.7606238714. The cubic root of 1211092940 is about 1065.9229774907.

The spelling of 1211092940 in words is "one billion, two hundred eleven million, ninety-two thousand, nine hundred forty".