102378990 has 64 divisors (see below), whose sum is σ = 290511360. Its totient is φ = 22592640.

The previous prime is 102378971. The next prime is 102379007. The reversal of 102378990 is 99873201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2316 + ... + 14495.

It is an arithmetic number, because the mean of its divisors is an integer number (4539240).

Almost surely, 2^102378990 is an apocalyptic number.

102378990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102378990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145255680).

102378990 is an abundant number, since it is smaller than the sum of its proper divisors (188132370).

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

102378990 is a wasteful number, since it uses less digits than its factorization.

102378990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16857.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 102378990 is about 10118.2503428211. The cubic root of 102378990 is about 467.8108392522.

The spelling of 102378990 in words is "one hundred two million, three hundred seventy-eight thousand, nine hundred ninety".