1400721732 has 216 divisors, whose sum is σ = 4012200192. Its totient is φ = 411264000.

The previous prime is 1400721731. The next prime is 1400721757. The reversal of 1400721732 is 2371270041.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1400721696 and 1400721705.

It is not an unprimeable number, because it can be changed into a prime (1400721731) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13868482 + ... + 13868582.

Almost surely, 2^1400721732 is an apocalyptic number.

1400721732 is a gapful number since it is divisible by the number (12) 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 1400721732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2006100096).

1400721732 is an abundant number, since it is smaller than the sum of its proper divisors (2611478460).

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

1400721732 is a wasteful number, since it uses less digits than its factorization.

1400721732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 1400721732 is about 37426.2171745957. The cubic root of 1400721732 is about 1118.8811456300.

Adding to 1400721732 its reverse (2371270041), we get a palindrome (3771991773).

The spelling of 1400721732 in words is "one billion, four hundred million, seven hundred twenty-one thousand, seven hundred thirty-two".