3938457 has 8 divisors (see below), whose sum is σ = 5420800. Its totient is φ = 2540880.

The previous prime is 3938449. The next prime is 3938471. The reversal of 3938457 is 7548393.

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

It is not a de Polignac number, because 3938457 - 2³ = 3938449 is a prime.

It is a super-2 number, since 2×3938457² = 31022887081698, which contains 22 as substring.

It is a Duffinian number.

3938457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3938437) 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, 21082 + ... + 21267.

It is an arithmetic number, because the mean of its divisors is an integer number (677600).

Almost surely, 2^3938457 is an apocalyptic number.

It is an amenable number.

3938457 is a deficient number, since it is larger than the sum of its proper divisors (1482343).

3938457 is a wasteful number, since it uses less digits than its factorization.

3938457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42383.

The product of its digits is 90720, while the sum is 39.

The square root of 3938457 is about 1984.5546099818. The cubic root of 3938457 is about 157.9217820398.

The spelling of 3938457 in words is "three million, nine hundred thirty-eight thousand, four hundred fifty-seven".