1400424400 has 60 divisors (see below), whose sum is σ = 3383488800. Its totient is φ = 557011840.

The previous prime is 1400424379. The next prime is 1400424407. The reversal of 1400424400 is 44240041.

It is a super-2 number, since 2×1400424400² = 3922377000230720000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400424407) 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, 61821 + ... + 81379.

It is an arithmetic number, because the mean of its divisors is an integer number (56391480).

Almost surely, 2^1400424400 is an apocalyptic number.

1400424400 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 1400424400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691744400).

1400424400 is an abundant number, since it is smaller than the sum of its proper divisors (1983064400).

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

1400424400 is a wasteful number, since it uses less digits than its factorization.

1400424400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19756 (or 19745 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1400424400 is about 37422.2447215557. The cubic root of 1400424400 is about 1118.8019715149.

Adding to 1400424400 its reverse (44240041), we get a palindrome (1444664441).

The spelling of 1400424400 in words is "one billion, four hundred million, four hundred twenty-four thousand, four hundred".