3918740 has 48 divisors (see below), whose sum is σ = 9821952. Its totient is φ = 1284096.

The previous prime is 3918697. The next prime is 3918743. The reversal of 3918740 is 478193.

3918740 = T₂₉₉ + T₃₀₀ + ... + T₃₆₈.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3918697 and 3918706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3918743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2612 + ... + 3828.

It is an arithmetic number, because the mean of its divisors is an integer number (204624).

Almost surely, 2^3918740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3918740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4910976).

3918740 is an abundant number, since it is smaller than the sum of its proper divisors (5903212).

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

3918740 is a wasteful number, since it uses less digits than its factorization.

3918740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1254 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 3918740 is about 1979.5807636972. The cubic root of 3918740 is about 157.6578077335.

The spelling of 3918740 in words is "three million, nine hundred eighteen thousand, seven hundred forty".