2978721038 has 8 divisors (see below), whose sum is σ = 4588840632. Its totient is φ = 1449107496.

The previous prime is 2978721037. The next prime is 2978721047. The reversal of 2978721038 is 8301278792.

2978721038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 2978720983 and 2978721001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978721037) 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, 20126420 + ... + 20126567.

It is an arithmetic number, because the mean of its divisors is an integer number (573605079).

Almost surely, 2^2978721038 is an apocalyptic number.

2978721038 is a deficient number, since it is larger than the sum of its proper divisors (1610119594).

2978721038 is a wasteful number, since it uses less digits than its factorization.

2978721038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40253026.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 2978721038 is about 54577.6606131117. The cubic root of 2978721038 is about 1438.8315234918.

The spelling of 2978721038 in words is "two billion, nine hundred seventy-eight million, seven hundred twenty-one thousand, thirty-eight".