190061640 has 80 divisors (see below), whose sum is σ = 638829180. Its totient is φ = 50682240.

The previous prime is 190061633. The next prime is 190061659. The reversal of 190061640 is 46160091.

190061640 is a `hidden beast` number, since 1 + 9 + 0 + 0 + 616 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 171243396 + 18818244 = 13086^2 + 4338^2 .

It is a super-3 number, since 3×190061640³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 19 ways as a sum of consecutive naturals, for example, 26091 + ... + 32570.

Almost surely, 2^190061640 is an apocalyptic number.

190061640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190061640 is an abundant number, since it is smaller than the sum of its proper divisors (448767540).

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

190061640 is a wasteful number, since it uses less digits than its factorization.

190061640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58684 (or 58671 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 190061640 is about 13786.2844885778. The cubic root of 190061640 is about 574.9518699475.

The spelling of 190061640 in words is "one hundred ninety million, sixty-one thousand, six hundred forty".