3926640 has 40 divisors (see below), whose sum is σ = 12173328. Its totient is φ = 1047040.

The previous prime is 3926639. The next prime is 3926641. The reversal of 3926640 is 466293.

It is an interprime number because it is at equal distance from previous prime (3926639) and next prime (3926641).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3926598 and 3926607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3926641) 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 7 ways as a sum of consecutive naturals, for example, 7941 + ... + 8420.

Almost surely, 2^3926640 is an apocalyptic number.

3926640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3926640 is an abundant number, since it is smaller than the sum of its proper divisors (8246688).

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

3926640 is a wasteful number, since it uses less digits than its factorization.

3926640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16377 (or 16371 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 3926640 is about 1981.5751310511. The cubic root of 3926640 is about 157.7636802557.

The spelling of 3926640 in words is "three million, nine hundred twenty-six thousand, six hundred forty".