102890142 has 64 divisors (see below), whose sum is σ = 237557760. Its totient is φ = 32985792.

The previous prime is 102890113. The next prime is 102890213. The reversal of 102890142 is 241098201.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 169203 + ... + 169809.

It is an arithmetic number, because the mean of its divisors is an integer number (3711840).

Almost surely, 2^102890142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102890142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118778880).

102890142 is an abundant number, since it is smaller than the sum of its proper divisors (134667618).

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

102890142 is a wasteful number, since it uses less digits than its factorization.

102890142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 102890142 is about 10143.4778059598. The cubic root of 102890142 is about 468.5881002485.

The spelling of 102890142 in words is "one hundred two million, eight hundred ninety thousand, one hundred forty-two".