1978524 has 18 divisors (see below), whose sum is σ = 5001360. Its totient is φ = 659496.

The previous prime is 1978523. The next prime is 1978531. The reversal of 1978524 is 4258791.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 54959 = 1978524 / (1 + 9 + 7 + 8 + 5 + 2 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27444 + ... + 27515.

2^1978524 is an apocalyptic number.

It is an amenable number.

1978524 is an abundant number, since it is smaller than the sum of its proper divisors (3022836).

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

1978524 is a wasteful number, since it uses less digits than its factorization.

1978524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54969 (or 54964 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1978524 is about 1406.6001564055. The cubic root of 1978524 is about 125.5395133856.

The spelling of 1978524 in words is "one million, nine hundred seventy-eight thousand, five hundred twenty-four".