3900478 has 8 divisors (see below), whose sum is σ = 6105168. Its totient is φ = 1865424.

The previous prime is 3900473. The next prime is 3900499. The reversal of 3900478 is 8740093.

It is a happy number.

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 (3900473) 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, 42351 + ... + 42442.

It is an arithmetic number, because the mean of its divisors is an integer number (763146).

Almost surely, 2^3900478 is an apocalyptic number.

3900478 is a deficient number, since it is larger than the sum of its proper divisors (2204690).

3900478 is a wasteful number, since it uses less digits than its factorization.

3900478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84818.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 3900478 is about 1974.9627844595. The cubic root of 3900478 is about 157.4125221792.

The spelling of 3900478 in words is "three million, nine hundred thousand, four hundred seventy-eight".