187472890 has 16 divisors (see below), whose sum is σ = 368128800. Its totient is φ = 68171920.

The previous prime is 187472861. The next prime is 187472891. The reversal of 187472890 is 98274781.

It is a self number, because there is not a number n which added to its sum of digits gives 187472890.

It is not an unprimeable number, because it can be changed into a prime (187472891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852040 + ... + 852259.

It is an arithmetic number, because the mean of its divisors is an integer number (23008050).

Almost surely, 2^187472890 is an apocalyptic number.

187472890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

187472890 is a deficient number, since it is larger than the sum of its proper divisors (180655910).

187472890 is a wasteful number, since it uses less digits than its factorization.

187472890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704317.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 187472890 is about 13692.0739846088. The cubic root of 187472890 is about 572.3295348776.

The spelling of 187472890 in words is "one hundred eighty-seven million, four hundred seventy-two thousand, eight hundred ninety".