5511978 has 24 divisors (see below), whose sum is σ = 12645828. Its totient is φ = 1729152.

The previous prime is 5511977. The next prime is 5511983. The reversal of 5511978 is 8791155.

It can be written as a sum of positive squares in 2 ways, for example, as 4652649 + 859329 = 2157^2 + 927^2 .

It is not an unprimeable number, because it can be changed into a prime (5511971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8701 + ... + 9312.

Almost surely, 2^5511978 is an apocalyptic number.

5511978 is an abundant number, since it is smaller than the sum of its proper divisors (7133850).

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

5511978 is a wasteful number, since it uses less digits than its factorization.

5511978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18038 (or 18035 counting only the distinct ones).

The product of its digits is 12600, while the sum is 36.

The square root of 5511978 is about 2347.7602092207. The cubic root of 5511978 is about 176.6454648027.

The spelling of 5511978 in words is "five million, five hundred eleven thousand, nine hundred seventy-eight".