178842340 has 12 divisors (see below), whose sum is σ = 375568956. Its totient is φ = 71536928.

The previous prime is 178842337. The next prime is 178842343. The reversal of 178842340 is 43248871.

178842340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (178842337) and next prime (178842343).

It can be written as a sum of positive squares in 2 ways, for example, as 135070884 + 43771456 = 11622^2 + 6616^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 178842340.

It is not an unprimeable number, because it can be changed into a prime (178842343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4471039 + ... + 4471078.

It is an arithmetic number, because the mean of its divisors is an integer number (31297413).

Almost surely, 2^178842340 is an apocalyptic number.

178842340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

178842340 is an abundant number, since it is smaller than the sum of its proper divisors (196726616).

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

178842340 is a wasteful number, since it uses less digits than its factorization.

178842340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8942126 (or 8942124 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 178842340 is about 13373.1948314530. The cubic root of 178842340 is about 563.4085688606.

The spelling of 178842340 in words is "one hundred seventy-eight million, eight hundred forty-two thousand, three hundred forty".