1978472 has 8 divisors (see below), whose sum is σ = 3709650. Its totient is φ = 989232.

The previous prime is 1978469. The next prime is 1978507. The reversal of 1978472 is 2748791.

It can be written as a sum of positive squares in only one way, i.e., 1779556 + 198916 = 1334^2 + 446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×1978472³ = 23233304254348230144, which contains 333 as substring.

It is an Ulam number.

It is a zygodrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123647 + ... + 123662.

2^1978472 is an apocalyptic number.

It is an amenable number.

1978472 is a deficient number, since it is larger than the sum of its proper divisors (1731178).

1978472 is a wasteful number, since it uses less digits than its factorization.

1978472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247315 (or 247311 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 1978472 is about 1406.5816719978. The cubic root of 1978472 is about 125.5384135570.

The spelling of 1978472 in words is "one million, nine hundred seventy-eight thousand, four hundred seventy-two".