197090740 has 144 divisors (see below), whose sum is σ = 537788160. Its totient is φ = 59969280.

The previous prime is 197090737. The next prime is 197090753. The reversal of 197090740 is 47090791.

It is a self number, because there is not a number n which added to its sum of digits gives 197090740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 506466 + ... + 506854.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^197090740 is an apocalyptic number.

197090740 is a gapful number since it is divisible by the number (10) 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 197090740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268894080).

197090740 is an abundant number, since it is smaller than the sum of its proper divisors (340697420).

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

197090740 is a wasteful number, since it uses less digits than its factorization.

197090740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 197090740 is about 14038.9009541346. The cubic root of 197090740 is about 581.9541104491.

The spelling of 197090740 in words is "one hundred ninety-seven million, ninety thousand, seven hundred forty".