102945890 has 16 divisors (see below), whose sum is σ = 185613120. Its totient is φ = 41109360.

The previous prime is 102945889. The next prime is 102945917. The reversal of 102945890 is 98549201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126 + ... + 14505.

It is an arithmetic number, because the mean of its divisors is an integer number (11600820).

Almost surely, 2^102945890 is an apocalyptic number.

102945890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102945890 is a deficient number, since it is larger than the sum of its proper divisors (82667230).

102945890 is a wasteful number, since it uses less digits than its factorization.

102945890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17257.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 102945890 is about 10146.2254065243. The cubic root of 102945890 is about 468.6727151992.

The spelling of 102945890 in words is "one hundred two million, nine hundred forty-five thousand, eight hundred ninety".