3989654978362 has 4 divisors (see below), whose sum is σ = 5984482467546. Its totient is φ = 1994827489180.

The previous prime is 3989654978347. The next prime is 3989654978381. The reversal of 3989654978362 is 2638794569893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2382543515401 + 1607111462961 = 1543549^2 + 1267719^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997413744589 + ... + 997413744592.

Almost surely, 2^{3989654978362} is an apocalyptic number.

3989654978362 is a deficient number, since it is larger than the sum of its proper divisors (1994827489184).

3989654978362 is a wasteful number, since it uses less digits than its factorization.

3989654978362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994827489183.

The product of its digits is 4232632320, while the sum is 79.

The spelling of 3989654978362 in words is "three trillion, nine hundred eighty-nine billion, six hundred fifty-four million, nine hundred seventy-eight thousand, three hundred sixty-two".