1400403144 has 128 divisors (see below), whose sum is σ = 4103424000. Its totient is φ = 398099520.

The previous prime is 1400403133. The next prime is 1400403157. The reversal of 1400403144 is 4413040041.

It is a super-2 number, since 2×1400403144² = 3922257931450169472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1400403144.

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, 2559879 + ... + 2560425.

It is an arithmetic number, because the mean of its divisors is an integer number (32058000).

Almost surely, 2^1400403144 is an apocalyptic number.

1400403144 is a gapful number since it is divisible by the number (14) 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 1400403144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2051712000).

1400403144 is an abundant number, since it is smaller than the sum of its proper divisors (2703020856).

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

1400403144 is a wasteful number, since it uses less digits than its factorization.

1400403144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1400403144 is about 37421.9607182734. The cubic root of 1400403144 is about 1118.7963109987.

Adding to 1400403144 its reverse (4413040041), we get a palindrome (5813443185).

The spelling of 1400403144 in words is "one billion, four hundred million, four hundred three thousand, one hundred forty-four".