202191620 has 48 divisors (see below), whose sum is σ = 446681088. Its totient is φ = 76728960.

The previous prime is 202191617. The next prime is 202191629. The reversal of 202191620 is 26191202.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (202191629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56690 + ... + 60150.

It is an arithmetic number, because the mean of its divisors is an integer number (9305856).

Almost surely, 2^202191620 is an apocalyptic number.

202191620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202191620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223340544).

202191620 is an abundant number, since it is smaller than the sum of its proper divisors (244489468).

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

202191620 is a wasteful number, since it uses less digits than its factorization.

202191620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620 (or 3618 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 202191620 is about 14219.4099736944. The cubic root of 202191620 is about 586.9319041416.

The spelling of 202191620 in words is "two hundred two million, one hundred ninety-one thousand, six hundred twenty".