201985740 has 72 divisors (see below), whose sum is σ = 668395728. Its totient is φ = 48965760.

The previous prime is 201985727. The next prime is 201985787. The reversal of 201985740 is 47589102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 201985695 and 201985704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49027 + ... + 52986.

It is an arithmetic number, because the mean of its divisors is an integer number (9283274).

Almost surely, 2^201985740 is an apocalyptic number.

201985740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201985740 is an abundant number, since it is smaller than the sum of its proper divisors (466409988).

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

201985740 is a wasteful number, since it uses less digits than its factorization.

201985740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102039 (or 102034 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 201985740 is about 14212.1687296485. The cubic root of 201985740 is about 586.7326235819.

The spelling of 201985740 in words is "two hundred one million, nine hundred eighty-five thousand, seven hundred forty".