2978432 has 16 divisors (see below), whose sum is σ = 5933850. Its totient is φ = 1489152.

The previous prime is 2978429. The next prime is 2978453. The reversal of 2978432 is 2348792.

It can be written as a sum of positive squares in only one way, i.e., 2637376 + 341056 = 1624^2 + 584^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 2978392 and 2978401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11507 + ... + 11762.

2^2978432 is an apocalyptic number.

It is an amenable number.

2978432 is a deficient number, since it is larger than the sum of its proper divisors (2955418).

2978432 is an equidigital number, since it uses as much as digits as its factorization.

2978432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23283 (or 23271 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 2978432 is about 1725.8134313998. The cubic root of 2978432 is about 143.8784983334.

It can be divided in two parts, 297843 and 2, that multiplied together give a triangular number (595686 = T₁₀₉₁).

The spelling of 2978432 in words is "two million, nine hundred seventy-eight thousand, four hundred thirty-two".