1426531644 has 18 divisors (see below), whose sum is σ = 3605955080. Its totient is φ = 475510536.

The previous prime is 1426531637. The next prime is 1426531651. The reversal of 1426531644 is 4461356241.

1426531644 is a `hidden beast` number, since 1 + 4 + 2 + 6 + 5 + 3 + 1 + 644 = 666.

It is an interprime number because it is at equal distance from previous prime (1426531637) and next prime (1426531651).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 39625879 = 1426531644 / (1 + 4 + 2 + 6 + 5 + 3 + 1 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 1426531599 and 1426531608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19812904 + ... + 19812975.

Almost surely, 2^1426531644 is an apocalyptic number.

It is an amenable number.

1426531644 is an abundant number, since it is smaller than the sum of its proper divisors (2179423436).

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

1426531644 is a wasteful number, since it uses less digits than its factorization.

1426531644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39625889 (or 39625884 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1426531644 is about 37769.4538483150. The cubic root of 1426531644 is about 1125.7115877358.

Adding to 1426531644 its reverse (4461356241), we get a palindrome (5887887885).

The spelling of 1426531644 in words is "one billion, four hundred twenty-six million, five hundred thirty-one thousand, six hundred forty-four".