1401040420 has 72 divisors (see below), whose sum is σ = 3206722176. Its totient is φ = 513931392.

The previous prime is 1401040379. The next prime is 1401040441. The reversal of 1401040420 is 240401041.

It is a junction number, because it is equal to n+sod(n) for n = 1401040394 and 1401040403.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549669 + ... + 552211.

It is an arithmetic number, because the mean of its divisors is an integer number (44537808).

Almost surely, 2^1401040420 is an apocalyptic number.

1401040420 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 1401040420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603361088).

1401040420 is an abundant number, since it is smaller than the sum of its proper divisors (1805681756).

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

1401040420 is a wasteful number, since it uses less digits than its factorization.

1401040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741 (or 2726 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1401040420 is about 37430.4744826993. The cubic root of 1401040420 is about 1118.9659940210.

Adding to 1401040420 its reverse (240401041), we get a palindrome (1641441461).

The spelling of 1401040420 in words is "one billion, four hundred one million, forty thousand, four hundred twenty".