3942490 has 8 divisors (see below), whose sum is σ = 7096500. Its totient is φ = 1576992.

The previous prime is 3942479. The next prime is 3942493. The reversal of 3942490 is 942493.

It can be written as a sum of positive squares in 2 ways, for example, as 3932289 + 10201 = 1983^2 + 101^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3942493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197115 + ... + 197134.

Almost surely, 2^3942490 is an apocalyptic number.

3942490 is a deficient number, since it is larger than the sum of its proper divisors (3154010).

3942490 is a wasteful number, since it uses less digits than its factorization.

3942490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394256.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 3942490 is about 1985.5704470001. The cubic root of 3942490 is about 157.9756678868.

It can be divided in two parts, 39 and 42490, that multiplied together give a triangular number (1657110 = T₁₈₂₀).

The spelling of 3942490 in words is "three million, nine hundred forty-two thousand, four hundred ninety".