1401291144 has 128 divisors (see below), whose sum is σ = 4260556800. Its totient is φ = 423213120.

The previous prime is 1401291139. The next prime is 1401291161. The reversal of 1401291144 is 4411921041.

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

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, 871189 + ... + 872795.

It is an arithmetic number, because the mean of its divisors is an integer number (33285600).

Almost surely, 2^1401291144 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 1401291144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130278400).

1401291144 is an abundant number, since it is smaller than the sum of its proper divisors (2859265656).

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

1401291144 is a wasteful number, since it uses less digits than its factorization.

1401291144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1401291144 is about 37433.8235289958. The cubic root of 1401291144 is about 1119.0327384423.

The spelling of 1401291144 in words is "one billion, four hundred one million, two hundred ninety-one thousand, one hundred forty-four".