1400253400 has 288 divisors, whose sum is σ = 4230198000. Its totient is φ = 426746880.

The previous prime is 1400253397. The next prime is 1400253427. The reversal of 1400253400 is 43520041.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3694411 + ... + 3694789.

Almost surely, 2^1400253400 is an apocalyptic number.

1400253400 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 1400253400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115099000).

1400253400 is an abundant number, since it is smaller than the sum of its proper divisors (2829944600).

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

1400253400 is a wasteful number, since it uses less digits than its factorization.

1400253400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1400253400 is about 37419.9599144628. The cubic root of 1400253400 is about 1118.7564322425.

Adding to 1400253400 its reverse (43520041), we get a palindrome (1443773441).

The spelling of 1400253400 in words is "one billion, four hundred million, two hundred fifty-three thousand, four hundred".