383291401220 has 384 divisors, whose sum is σ = 1042761947136. Its totient is φ = 115127599104.

The previous prime is 383291401189. The next prime is 383291401387. The reversal of 383291401220 is 22104192383.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 506329082 + ... + 506329838.

It is an arithmetic number, because the mean of its divisors is an integer number (2715525904).

Almost surely, 2^383291401220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 383291401220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521380973568).

383291401220 is an abundant number, since it is smaller than the sum of its proper divisors (659470545916).

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

383291401220 is a wasteful number, since it uses less digits than its factorization.

383291401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 383291401220 in words is "three hundred eighty-three billion, two hundred ninety-one million, four hundred one thousand, two hundred twenty".