202101438 has 64 divisors (see below), whose sum is σ = 505999872. Its totient is φ = 52279680.

The previous prime is 202101421. The next prime is 202101439. The reversal of 202101438 is 834101202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101439) 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, 134620 + ... + 136112.

It is an arithmetic number, because the mean of its divisors is an integer number (7906248).

Almost surely, 2^202101438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202101438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252999936).

202101438 is an abundant number, since it is smaller than the sum of its proper divisors (303898434).

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

202101438 is a wasteful number, since it uses less digits than its factorization.

202101438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 202101438 is about 14216.2385320450. The cubic root of 202101438 is about 586.8446295645.

The spelling of 202101438 in words is "two hundred two million, one hundred one thousand, four hundred thirty-eight".