1211090964 has 48 divisors (see below), whose sum is σ = 2901192000. Its totient is φ = 392981760.

The previous prime is 1211090963. The next prime is 1211090983. The reversal of 1211090964 is 4690901121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211090963) 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, 243042 + ... + 247974.

It is an arithmetic number, because the mean of its divisors is an integer number (60441500).

Almost surely, 2^1211090964 is an apocalyptic number.

It is an amenable number.

1211090964 is an abundant number, since it is smaller than the sum of its proper divisors (1690101036).

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

1211090964 is a wasteful number, since it uses less digits than its factorization.

1211090964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480 (or 5478 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1211090964 is about 34800.7322336758. The cubic root of 1211090964 is about 1065.9223977761.

The spelling of 1211090964 in words is "one billion, two hundred eleven million, ninety thousand, nine hundred sixty-four".