3648978 has 24 divisors (see below), whose sum is σ = 8017308. Its totient is φ = 1199232.

The previous prime is 3648947. The next prime is 3648989. The reversal of 3648978 is 8798463.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3560769 + 88209 = 1887^2 + 297^2 .

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, 75 + ... + 2702.

Almost surely, 2^3648978 is an apocalyptic number.

3648978 is an abundant number, since it is smaller than the sum of its proper divisors (4368330).

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

3648978 is a wasteful number, since it uses less digits than its factorization.

3648978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858 (or 2855 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 3648978 is about 1910.2298291043. The cubic root of 3648978 is about 153.9538007255.

The spelling of 3648978 in words is "three million, six hundred forty-eight thousand, nine hundred seventy-eight".