1201394880 has 336 divisors, whose sum is σ = 4929859584. Its totient is φ = 262563840.

The previous prime is 1201394809. The next prime is 1201394893. The reversal of 1201394880 is 884931021.

It is a tau number, because it is divible by the number of its divisors (336).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 462385 + ... + 464975.

Almost surely, 2^1201394880 is an apocalyptic number.

1201394880 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 1201394880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2464929792).

1201394880 is an abundant number, since it is smaller than the sum of its proper divisors (3728464704).

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

1201394880 is a wasteful number, since it uses less digits than its factorization.

1201394880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1201394880 is about 34661.1436626087. The cubic root of 1201394880 is about 1063.0701545218.

The spelling of 1201394880 in words is "one billion, two hundred one million, three hundred ninety-four thousand, eight hundred eighty".