1400012400 has 60 divisors (see below), whose sum is σ = 4484710232. Its totient is φ = 373336320.

The previous prime is 1400012389. The next prime is 1400012413. The reversal of 1400012400 is 42100041.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 11 ways as a sum of consecutive naturals, for example, 582139 + ... + 584538.

Almost surely, 2^1400012400 is an apocalyptic number.

1400012400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400012400 is an abundant number, since it is smaller than the sum of its proper divisors (3084697832).

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

1400012400 is a wasteful number, since it uses less digits than its factorization.

1400012400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166698 (or 1166687 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1400012400 is about 37416.7395693425. The cubic root of 1400012400 is about 1118.6922448676.

Adding to 1400012400 its reverse (42100041), we get a palindrome (1442112441).

The spelling of 1400012400 in words is "one billion, four hundred million, twelve thousand, four hundred".