2389978516 has 6 divisors (see below), whose sum is σ = 4182462410. Its totient is φ = 1194989256.

The previous prime is 2389978483. The next prime is 2389978523. The reversal of 2389978516 is 6158799832.

It can be written as a sum of positive squares in only one way, i.e., 2261382916 + 128595600 = 47554^2 + 11340^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 298747311 + ... + 298747318.

Almost surely, 2^2389978516 is an apocalyptic number.

It is an amenable number.

2389978516 is a deficient number, since it is larger than the sum of its proper divisors (1792483894).

2389978516 is a wasteful number, since it uses less digits than its factorization.

2389978516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597494633 (or 597494631 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 58.

The square root of 2389978516 is about 48887.4065174253. The cubic root of 2389978516 is about 1336.9997693329. Note that the first 3 decimals are identical.

The spelling of 2389978516 in words is "two billion, three hundred eighty-nine million, nine hundred seventy-eight thousand, five hundred sixteen".