1400444420 has 12 divisors (see below), whose sum is σ = 2940933324. Its totient is φ = 560177760.

The previous prime is 1400444393. The next prime is 1400444431. The reversal of 1400444420 is 244440041.

It can be written as a sum of positive squares in 2 ways, for example, as 261921856 + 1138522564 = 16184^2 + 33742^2 .

It is a super-2 number, since 2×1400444420² = 3922489147018272800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35011091 + ... + 35011130.

It is an arithmetic number, because the mean of its divisors is an integer number (245077777).

Almost surely, 2^1400444420 is an apocalyptic number.

1400444420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400444420 is an abundant number, since it is smaller than the sum of its proper divisors (1540488904).

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

1400444420 is a wasteful number, since it uses less digits than its factorization.

1400444420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70022230 (or 70022228 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 1400444420 is about 37422.5122085624. The cubic root of 1400444420 is about 1118.8073028294.

Adding to 1400444420 its reverse (244440041), we get a palindrome (1644884461).

The spelling of 1400444420 in words is "one billion, four hundred million, four hundred forty-four thousand, four hundred twenty".