102238990 has 48 divisors (see below), whose sum is σ = 215780112. Its totient is φ = 34774656.

The previous prime is 102238973. The next prime is 102238991. The reversal of 102238990 is 99832201.

It is a super-2 number, since 2×102238990² = 20905622152440200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102238991) 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, 66369 + ... + 67891.

It is an arithmetic number, because the mean of its divisors is an integer number (4495419).

Almost surely, 2^102238990 is an apocalyptic number.

102238990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102238990 is an abundant number, since it is smaller than the sum of its proper divisors (113541122).

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

102238990 is a wasteful number, since it uses less digits than its factorization.

102238990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 102238990 is about 10111.3297839602. The cubic root of 102238990 is about 467.5975031839.

The spelling of 102238990 in words is "one hundred two million, two hundred thirty-eight thousand, nine hundred ninety".