201652780 has 48 divisors (see below), whose sum is σ = 490807296. Its totient is φ = 68160960.

The previous prime is 201652777. The next prime is 201652783. The reversal of 201652780 is 87256102.

It is an interprime number because it is at equal distance from previous prime (201652777) and next prime (201652783).

It is not an unprimeable number, because it can be changed into a prime (201652783) 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, 204 + ... + 20083.

It is an arithmetic number, because the mean of its divisors is an integer number (10225152).

Almost surely, 2^201652780 is an apocalyptic number.

201652780 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 201652780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245403648).

201652780 is an abundant number, since it is smaller than the sum of its proper divisors (289154516).

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

201652780 is a wasteful number, since it uses less digits than its factorization.

201652780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20374 (or 20372 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 201652780 is about 14200.4499928699. The cubic root of 201652780 is about 586.4100497574.

The spelling of 201652780 in words is "two hundred one million, six hundred fifty-two thousand, seven hundred eighty".