2978387 has 8 divisors (see below), whose sum is σ = 3181440. Its totient is φ = 2782080.

The previous prime is 2978377. The next prime is 2978399. The reversal of 2978387 is 7838792.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2978387 - 2⁶ = 2978323 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2978317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758 + ... + 2555.

It is an arithmetic number, because the mean of its divisors is an integer number (397680).

2^2978387 is an apocalyptic number.

2978387 is a deficient number, since it is larger than the sum of its proper divisors (203053).

2978387 is a wasteful number, since it uses less digits than its factorization.

2978387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373.

The product of its digits is 169344, while the sum is 44.

The square root of 2978387 is about 1725.8003940201. The cubic root of 2978387 is about 143.8777737279.

The spelling of 2978387 in words is "two million, nine hundred seventy-eight thousand, three hundred eighty-seven".