63840190 has 32 divisors (see below), whose sum is σ = 121497120. Its totient is φ = 24084864.

The previous prime is 63840187. The next prime is 63840199. The reversal of 63840190 is 9104836.

It is a super-2 number, since 2×63840190² = 8151139718472200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63840199) 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, 52024 + ... + 53236.

It is an arithmetic number, because the mean of its divisors is an integer number (3796785).

Almost surely, 2^63840190 is an apocalyptic number.

63840190 is a deficient number, since it is larger than the sum of its proper divisors (57656930).

63840190 is a wasteful number, since it uses less digits than its factorization.

63840190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 63840190 is about 7990.0056320381. The cubic root of 63840190 is about 399.6667849965. Note that the first 3 decimals are identical.

The spelling of 63840190 in words is "sixty-three million, eight hundred forty thousand, one hundred ninety".