188451330 has 16 divisors (see below), whose sum is σ = 452283264. Its totient is φ = 50253680.

The previous prime is 188451313. The next prime is 188451331. The reversal of 188451330 is 33154881.

It is a junction number, because it is equal to n+sod(n) for n = 188451291 and 188451300.

It is not an unprimeable number, because it can be changed into a prime (188451331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3140826 + ... + 3140885.

It is an arithmetic number, because the mean of its divisors is an integer number (28267704).

Almost surely, 2^188451330 is an apocalyptic number.

188451330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188451330 is an abundant number, since it is smaller than the sum of its proper divisors (263831934).

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

188451330 is a wasteful number, since it uses less digits than its factorization.

188451330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6281721.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 188451330 is about 13727.7576464621. The cubic root of 188451330 is about 573.3234896303.

The spelling of 188451330 in words is "one hundred eighty-eight million, four hundred fifty-one thousand, three hundred thirty".