1400023442 has 4 divisors (see below), whose sum is σ = 2100035166. Its totient is φ = 700011720.

The previous prime is 1400023439. The next prime is 1400023447. The reversal of 1400023442 is 2443200041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2443200041 = 5003 ⋅488347.

It can be written as a sum of positive squares in only one way, i.e., 1293912841 + 106110601 = 35971^2 + 10301^2 .

It is not an unprimeable number, because it can be changed into a prime (1400023447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350005859 + ... + 350005862.

Almost surely, 2^1400023442 is an apocalyptic number.

1400023442 is a deficient number, since it is larger than the sum of its proper divisors (700011724).

1400023442 is an equidigital number, since it uses as much as digits as its factorization.

1400023442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700011723.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1400023442 is about 37416.8871233298. The cubic root of 1400023442 is about 1118.6951859290.

Adding to 1400023442 its reverse (2443200041), we get a palindrome (3843223483).

The spelling of 1400023442 in words is "one billion, four hundred million, twenty-three thousand, four hundred forty-two".