102390840 has 96 divisors (see below), whose sum is σ = 341808480. Its totient is φ = 26562816.

The previous prime is 102390833. The next prime is 102390853. The reversal of 102390840 is 48093201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9477 + ... + 17163.

It is an arithmetic number, because the mean of its divisors is an integer number (3560505).

Almost surely, 2^102390840 is an apocalyptic number.

102390840 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 102390840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170904240).

102390840 is an abundant number, since it is smaller than the sum of its proper divisors (239417640).

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

102390840 is a wasteful number, since it uses less digits than its factorization.

102390840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7741 (or 7734 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 102390840 is about 10118.8359014266. The cubic root of 102390840 is about 467.8288876968.

The spelling of 102390840 in words is "one hundred two million, three hundred ninety thousand, eight hundred forty".