1639868146 has 8 divisors (see below), whose sum is σ = 2811202560. Its totient is φ = 702800628.

The previous prime is 1639868143. The next prime is 1639868173. The reversal of 1639868146 is 6418689361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1639868093 and 1639868102.

It is not an unprimeable number, because it can be changed into a prime (1639868141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58566706 + ... + 58566733.

It is an arithmetic number, because the mean of its divisors is an integer number (351400320).

Almost surely, 2^1639868146 is an apocalyptic number.

1639868146 is a deficient number, since it is larger than the sum of its proper divisors (1171334414).

1639868146 is a wasteful number, since it uses less digits than its factorization.

1639868146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117133448.

The product of its digits is 1492992, while the sum is 52.

The square root of 1639868146 is about 40495.2854786826. The cubic root of 1639868146 is about 1179.2421030911.

The spelling of 1639868146 in words is "one billion, six hundred thirty-nine million, eight hundred sixty-eight thousand, one hundred forty-six".