188694450 has 144 divisors (see below), whose sum is σ = 595408320. Its totient is φ = 41938560.

The previous prime is 188694437. The next prime is 188694523. The reversal of 188694450 is 54496881.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 188694396 and 188694405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 115741 + ... + 117359.

It is an arithmetic number, because the mean of its divisors is an integer number (4134780).

Almost surely, 2^188694450 is an apocalyptic number.

188694450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 188694450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297704160).

188694450 is an abundant number, since it is smaller than the sum of its proper divisors (406713870).

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

188694450 is a wasteful number, since it uses less digits than its factorization.

188694450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681 (or 1673 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 188694450 is about 13736.6098437715. The cubic root of 188694450 is about 573.5699308187.

It can be divided in two parts, 18 and 8694450, that multiplied together give a square (156500100 = 12510²).

The spelling of 188694450 in words is "one hundred eighty-eight million, six hundred ninety-four thousand, four hundred fifty".