3947072 has 14 divisors (see below), whose sum is σ = 7832598. Its totient is φ = 1973504.

The previous prime is 3947071. The next prime is 3947087. The reversal of 3947072 is 2707493.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3936256 + 10816 = 1984^2 + 104^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (3947071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30773 + ... + 30900.

Almost surely, 2^3947072 is an apocalyptic number.

3947072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3947072 is a deficient number, since it is larger than the sum of its proper divisors (3885526).

3947072 is an equidigital number, since it uses as much as digits as its factorization.

3947072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61685 (or 61675 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 3947072 is about 1986.7239365347. The cubic root of 3947072 is about 158.0368444759.

The spelling of 3947072 in words is "three million, nine hundred forty-seven thousand, seventy-two".