1400320400 has 60 divisors (see below), whose sum is σ = 3370711344. Its totient is φ = 559056000.

The previous prime is 1400320399. The next prime is 1400320409. The reversal of 1400320400 is 40230041.

It is not an unprimeable number, because it can be changed into a prime (1400320409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225335 + ... + 231465.

Almost surely, 2^1400320400 is an apocalyptic number.

1400320400 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 1400320400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1685355672).

1400320400 is an abundant number, since it is smaller than the sum of its proper divisors (1970390944).

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

1400320400 is a wasteful number, since it uses less digits than its factorization.

1400320400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6720 (or 6709 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1400320400 is about 37420.8551478985. The cubic root of 1400320400 is about 1118.7742755570.

Adding to 1400320400 its reverse (40230041), we get a palindrome (1440550441).

The spelling of 1400320400 in words is "one billion, four hundred million, three hundred twenty thousand, four hundred".