87944142 has 32 divisors (see below), whose sum is σ = 206640000. Its totient is φ = 24599520.

The previous prime is 87944123. The next prime is 87944147. The reversal of 87944142 is 24144978.

It is a super-2 number, since 2×87944142² = 15468344224232328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 87944142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87944147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50392 + ... + 52107.

It is an arithmetic number, because the mean of its divisors is an integer number (6457500).

Almost surely, 2^87944142 is an apocalyptic number.

87944142 is an abundant number, since it is smaller than the sum of its proper divisors (118695858).

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

87944142 is a wasteful number, since it uses less digits than its factorization.

87944142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102528.

The product of its digits is 64512, while the sum is 39.

The square root of 87944142 is about 9377.8538056423. The cubic root of 87944142 is about 444.7018867703.

The spelling of 87944142 in words is "eighty-seven million, nine hundred forty-four thousand, one hundred forty-two".