1211258880 has 384 divisors, whose sum is σ = 4650609600. Its totient is φ = 297271296.

The previous prime is 1211258879. The next prime is 1211258953. The reversal of 1211258880 is 888521121.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3594072 + ... + 3594408.

Almost surely, 2^1211258880 is an apocalyptic number.

1211258880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211258880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2325304800).

1211258880 is an abundant number, since it is smaller than the sum of its proper divisors (3439350720).

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

1211258880 is a wasteful number, since it uses less digits than its factorization.

1211258880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The square root of 1211258880 is about 34803.1446855022. The cubic root of 1211258880 is about 1065.9716583627.

The spelling of 1211258880 in words is "one billion, two hundred eleven million, two hundred fifty-eight thousand, eight hundred eighty".