102209990 has 16 divisors (see below), whose sum is σ = 185766048. Its totient is φ = 40486656.

The previous prime is 102209941. The next prime is 102210019. The reversal of 102209990 is 99902201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48587 + ... + 50646.

It is an arithmetic number, because the mean of its divisors is an integer number (11610378).

Almost surely, 2^102209990 is an apocalyptic number.

102209990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102209990 is a deficient number, since it is larger than the sum of its proper divisors (83556058).

102209990 is a wasteful number, since it uses less digits than its factorization.

102209990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99343.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 102209990 is about 10109.8956473348. The cubic root of 102209990 is about 467.5532877956.

The spelling of 102209990 in words is "one hundred two million, two hundred nine thousand, nine hundred ninety".