102690918 has 48 divisors (see below), whose sum is σ = 243646416. Its totient is φ = 31000320.

The previous prime is 102690899. The next prime is 102690919. The reversal of 102690918 is 819096201.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102690919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61146 + ... + 62802.

It is an arithmetic number, because the mean of its divisors is an integer number (5075967).

Almost surely, 2^102690918 is an apocalyptic number.

102690918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102690918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121823208).

102690918 is an abundant number, since it is smaller than the sum of its proper divisors (140955498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102690918 is a wasteful number, since it uses less digits than its factorization.

102690918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989 (or 1986 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 102690918 is about 10133.6527471588. The cubic root of 102690918 is about 468.2854657690.

The spelling of 102690918 in words is "one hundred two million, six hundred ninety thousand, nine hundred eighteen".