102685690 has 32 divisors (see below), whose sum is σ = 196525440. Its totient is φ = 38520000.

The previous prime is 102685679. The next prime is 102685697. The reversal of 102685690 is 96586201.

It is a super-2 number, since 2×102685690² = 21088701861552200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102685697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16515 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (6141420).

Almost surely, 2^102685690 is an apocalyptic number.

102685690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102685690 is a deficient number, since it is larger than the sum of its proper divisors (93839750).

102685690 is a wasteful number, since it uses less digits than its factorization.

102685690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5478.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 102685690 is about 10133.3947914803. The cubic root of 102685690 is about 468.2775188217.

The spelling of 102685690 in words is "one hundred two million, six hundred eighty-five thousand, six hundred ninety".