3900540 has 96 divisors (see below), whose sum is σ = 12870144. Its totient is φ = 864000.

The previous prime is 3900517. The next prime is 3900563. The reversal of 3900540 is 450093.

It is an interprime number because it is at equal distance from previous prime (3900517) and next prime (3900563).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15415 + ... + 15665.

It is an arithmetic number, because the mean of its divisors is an integer number (134064).

Almost surely, 2^3900540 is an apocalyptic number.

3900540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3900540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6435072).

3900540 is an abundant number, since it is smaller than the sum of its proper divisors (8969604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3900540 is a wasteful number, since it uses less digits than its factorization.

3900540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 3900540 is about 1974.9784808954. The cubic root of 3900540 is about 157.4133562244.

The spelling of 3900540 in words is "three million, nine hundred thousand, five hundred forty".