142735644 has 18 divisors (see below), whose sum is σ = 360804080. Its totient is φ = 47578536.

The previous prime is 142735639. The next prime is 142735667. The reversal of 142735644 is 446537241.

142735644 is a `hidden beast` number, since 1 + 4 + 2 + 7 + 3 + 5 + 644 = 666.

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: 3964879 = 142735644 / (1 + 4 + 2 + 7 + 3 + 5 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 142735599 and 142735608.

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, 1982404 + ... + 1982475.

Almost surely, 2^142735644 is an apocalyptic number.

It is an amenable number.

142735644 is an abundant number, since it is smaller than the sum of its proper divisors (218068436).

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

142735644 is a wasteful number, since it uses less digits than its factorization.

142735644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964889 (or 3964884 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 142735644 is about 11947.2023503413. The cubic root of 142735644 is about 522.6097160532.

The spelling of 142735644 in words is "one hundred forty-two million, seven hundred thirty-five thousand, six hundred forty-four".