202115890 has 16 divisors (see below), whose sum is σ = 385209432. Its totient is φ = 76090624.

The previous prime is 202115833. The next prime is 202115897. The reversal of 202115890 is 98511202.

It can be written as a sum of positive squares in 4 ways, for example, as 135187129 + 66928761 = 11627^2 + 8181^2 .

It is not an unprimeable number, because it can be changed into a prime (202115897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594289 + ... + 594628.

Almost surely, 2^202115890 is an apocalyptic number.

202115890 is a deficient number, since it is larger than the sum of its proper divisors (183093542).

202115890 is a wasteful number, since it uses less digits than its factorization.

202115890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188941.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 202115890 is about 14216.7468149362. The cubic root of 202115890 is about 586.8586173859.

The spelling of 202115890 in words is "two hundred two million, one hundred fifteen thousand, eight hundred ninety".