1400424 has 64 divisors (see below), whose sum is σ = 3801600. Its totient is φ = 428736.

The previous prime is 1400423. The next prime is 1400449. The reversal of 1400424 is 4240041.

It is a super-2 number, since 2×1400424² = 3922374759552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1400423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23707 + ... + 23765.

It is an arithmetic number, because the mean of its divisors is an integer number (59400).

2^1400424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1900800).

1400424 is an abundant number, since it is smaller than the sum of its proper divisors (2401176).

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

1400424 is a wasteful number, since it uses less digits than its factorization.

1400424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1400424 is about 1183.3951157580. The cubic root of 1400424 is about 111.8801864995.

Adding to 1400424 its reverse (4240041), we get a palindrome (5640465).

It can be divided in two parts, 14004 and 24, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 1400424 in words is "one million, four hundred thousand, four hundred twenty-four".