1400221140 has 96 divisors (see below), whose sum is σ = 4131219456. Its totient is φ = 353654400.

The previous prime is 1400221139. The next prime is 1400221157. The reversal of 1400221140 is 411220041.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 137215 + ... + 147065.

It is an arithmetic number, because the mean of its divisors is an integer number (43033536).

Almost surely, 2^1400221140 is an apocalyptic number.

1400221140 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 1400221140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2065609728).

1400221140 is an abundant number, since it is smaller than the sum of its proper divisors (2730998316).

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

1400221140 is a wasteful number, since it uses less digits than its factorization.

1400221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9989 (or 9987 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1400221140 is about 37419.5288586054. The cubic root of 1400221140 is about 1118.7478406167.

Adding to 1400221140 its reverse (411220041), we get a palindrome (1811441181).

The spelling of 1400221140 in words is "one billion, four hundred million, two hundred twenty-one thousand, one hundred forty".