1201403880 has 256 divisors, whose sum is σ = 4199040000. Its totient is φ = 305141760.

The previous prime is 1201403869. The next prime is 1201403881. The reversal of 1201403880 is 883041021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1201403881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2787265 + ... + 2787695.

It is an arithmetic number, because the mean of its divisors is an integer number (16402500).

Almost surely, 2^1201403880 is an apocalyptic number.

1201403880 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 1201403880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2099520000).

1201403880 is an abundant number, since it is smaller than the sum of its proper divisors (2997636120).

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

1201403880 is a wasteful number, since it uses less digits than its factorization.

1201403880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1201403880 is about 34661.2734907418. The cubic root of 1201403880 is about 1063.0728091049.

The spelling of 1201403880 in words is "one billion, two hundred one million, four hundred three thousand, eight hundred eighty".