195488890 has 32 divisors (see below), whose sum is σ = 358345296. Its totient is φ = 76769280.

The previous prime is 195488873. The next prime is 195488911. The reversal of 195488890 is 98884591.

It can be written as a sum of positive squares in 8 ways, for example, as 99860049 + 95628841 = 9993^2 + 9779^2 .

It is a super-2 number, since 2×195488890² = 76431812226864200, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 204654 + ... + 205606.

Almost surely, 2^195488890 is an apocalyptic number.

195488890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195488890 is a deficient number, since it is larger than the sum of its proper divisors (162856406).

195488890 is a wasteful number, since it uses less digits than its factorization.

195488890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314.

The product of its (nonzero) digits is 829440, while the sum is 52.

The square root of 195488890 is about 13981.7341556761. The cubic root of 195488890 is about 580.3732140167.

The spelling of 195488890 in words is "one hundred ninety-five million, four hundred eighty-eight thousand, eight hundred ninety".