2978658 has 24 divisors (see below), whose sum is σ = 6509568. Its totient is φ = 984312.

The previous prime is 2978629. The next prime is 2978681. The reversal of 2978658 is 8568792.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1635 + ... + 2937.

It is an arithmetic number, because the mean of its divisors is an integer number (271232).

2^2978658 is an apocalyptic number.

2978658 is an abundant number, since it is smaller than the sum of its proper divisors (3530910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2978658 is a wasteful number, since it uses less digits than its factorization.

2978658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438 (or 1435 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 2978658 is about 1725.8789065285. The cubic root of 2978658 is about 143.8821373531.

It can be divided in two parts, 29 and 78658, that added together give a palindrome (78687).

The spelling of 2978658 in words is "two million, nine hundred seventy-eight thousand, six hundred fifty-eight".