3970785 has 32 divisors (see below), whose sum is σ = 7822080. Its totient is φ = 1675008.

The previous prime is 3970781. The next prime is 3970787. The reversal of 3970785 is 5870793.

It is not a de Polignac number, because 3970785 - 2² = 3970781 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (3970781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90 + ... + 2819.

It is an arithmetic number, because the mean of its divisors is an integer number (244440).

Almost surely, 2^3970785 is an apocalyptic number.

3970785 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3970785 is a deficient number, since it is larger than the sum of its proper divisors (3851295).

3970785 is a wasteful number, since it uses less digits than its factorization.

3970785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 3970785 is about 1992.6828648834. The cubic root of 3970785 is about 158.3526944622.

The spelling of 3970785 in words is "three million, nine hundred seventy thousand, seven hundred eighty-five".