3997407 has 8 divisors (see below), whose sum is σ = 5403184. Its totient is φ = 2628288.

The previous prime is 3997403. The next prime is 3997453. The reversal of 3997407 is 7047993.

3997407 = T₉₃₈ + T₉₃₉ + ... + T₉₄₆.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3997407 - 2² = 3997403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8908 + ... + 9345.

It is an arithmetic number, because the mean of its divisors is an integer number (675398).

Almost surely, 2^3997407 is an apocalyptic number.

3997407 is a deficient number, since it is larger than the sum of its proper divisors (1405777).

3997407 is a wasteful number, since it uses less digits than its factorization.

3997407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18329.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 3997407 is about 1999.3516449089. The cubic root of 3997407 is about 158.7057966912.

The spelling of 3997407 in words is "three million, nine hundred ninety-seven thousand, four hundred seven".