194739540 has 24 divisors (see below), whose sum is σ = 545270880. Its totient is φ = 51930528.

The previous prime is 194739533. The next prime is 194739541. The reversal of 194739540 is 45937491.

It is a junction number, because it is equal to n+sod(n) for n = 194739492 and 194739501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194739541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1622770 + ... + 1622889.

It is an arithmetic number, because the mean of its divisors is an integer number (22719620).

Almost surely, 2^194739540 is an apocalyptic number.

194739540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194739540 is an abundant number, since it is smaller than the sum of its proper divisors (350531340).

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

194739540 is a wasteful number, since it uses less digits than its factorization.

194739540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245671 (or 3245669 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 194739540 is about 13954.9109635282. The cubic root of 194739540 is about 579.6307003024.

The spelling of 194739540 in words is "one hundred ninety-four million, seven hundred thirty-nine thousand, five hundred forty".