102691320 has 128 divisors (see below), whose sum is σ = 332812800. Its totient is φ = 25270784.

The previous prime is 102691301. The next prime is 102691327. The reversal of 102691320 is 23196201.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102691327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79399 + ... + 80681.

It is an arithmetic number, because the mean of its divisors is an integer number (2600100).

Almost surely, 2^102691320 is an apocalyptic number.

102691320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102691320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166406400).

102691320 is an abundant number, since it is smaller than the sum of its proper divisors (230121480).

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

102691320 is a wasteful number, since it uses less digits than its factorization.

102691320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 102691320 is about 10133.6725820405. The cubic root of 102691320 is about 468.2860768276.

The spelling of 102691320 in words is "one hundred two million, six hundred ninety-one thousand, three hundred twenty".