1402400131220 has 96 divisors (see below), whose sum is σ = 3306493491840. Its totient is φ = 495224271360.

The previous prime is 1402400131201. The next prime is 1402400131243. The reversal of 1402400131220 is 221310042041.

It is a super-2 number, since 2×1402400131220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1402400131192 and 1402400131201.

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, 1208126 + ... + 2065034.

It is an arithmetic number, because the mean of its divisors is an integer number (34442640540).

Almost surely, 2^{1402400131220} is an apocalyptic number.

1402400131220 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 1402400131220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1653246745920).

1402400131220 is an abundant number, since it is smaller than the sum of its proper divisors (1904093360620).

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

1402400131220 is a wasteful number, since it uses less digits than its factorization.

1402400131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857145 (or 857143 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1402400131220 its reverse (221310042041), we get a palindrome (1623710173261).

The spelling of 1402400131220 in words is "one trillion, four hundred two billion, four hundred million, one hundred thirty-one thousand, two hundred twenty".