3972578 has 4 divisors (see below), whose sum is σ = 5958870. Its totient is φ = 1986288.

The previous prime is 3972569. The next prime is 3972593. The reversal of 3972578 is 8752793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3972049 + 529 = 1993^2 + 23^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993143 + ... + 993146.

Almost surely, 2^3972578 is an apocalyptic number.

3972578 is a deficient number, since it is larger than the sum of its proper divisors (1986292).

3972578 is a wasteful number, since it uses less digits than its factorization.

3972578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986291.

The product of its digits is 105840, while the sum is 41.

The square root of 3972578 is about 1993.1327100823. The cubic root of 3972578 is about 158.3765254894.

The spelling of 3972578 in words is "three million, nine hundred seventy-two thousand, five hundred seventy-eight".