3531978 has 16 divisors (see below), whose sum is σ = 7848960. Its totient is φ = 1177308.

The previous prime is 3531911. The next prime is 3531989. The reversal of 3531978 is 8791353.

It is a super-3 number, since 3×3531978³ (a number of 21 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32650 + ... + 32757.

It is an arithmetic number, because the mean of its divisors is an integer number (490560).

Almost surely, 2^3531978 is an apocalyptic number.

3531978 is an abundant number, since it is smaller than the sum of its proper divisors (4316982).

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

3531978 is a wasteful number, since it uses less digits than its factorization.

3531978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65418 (or 65412 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 3531978 is about 1879.3557406729. The cubic root of 3531978 is about 152.2904476485.

The spelling of 3531978 in words is "three million, five hundred thirty-one thousand, nine hundred seventy-eight".