2978555 has 4 divisors (see below), whose sum is σ = 3574272. Its totient is φ = 2382840.

The previous prime is 2978551. The next prime is 2978593. The reversal of 2978555 is 5558792.

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

It is not a de Polignac number, because 2978555 - 2² = 2978551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2978551) 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, 297851 + ... + 297860.

It is an arithmetic number, because the mean of its divisors is an integer number (893568).

2^2978555 is an apocalyptic number.

2978555 is a deficient number, since it is larger than the sum of its proper divisors (595717).

2978555 is an equidigital number, since it uses as much as digits as its factorization.

2978555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595716.

The product of its digits is 126000, while the sum is 41.

The square root of 2978555 is about 1725.8490664018. The cubic root of 2978555 is about 143.8804788847.

The spelling of 2978555 in words is "two million, nine hundred seventy-eight thousand, five hundred fifty-five".