142889040 has 120 divisors (see below), whose sum is σ = 548441088. Its totient is φ = 32659200.

The previous prime is 142889039. The next prime is 142889069. The reversal of 142889040 is 40988241.

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 142888986 and 142889004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9136 + ... + 19215.

Almost surely, 2^142889040 is an apocalyptic number.

142889040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142889040 is an abundant number, since it is smaller than the sum of its proper divisors (405552048).

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

142889040 is a wasteful number, since it uses less digits than its factorization.

142889040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28377 (or 28368 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 142889040 is about 11953.6203720881. The cubic root of 142889040 is about 522.7968628117.

The spelling of 142889040 in words is "one hundred forty-two million, eight hundred eighty-nine thousand, forty".