3900026640 has 80 divisors (see below), whose sum is σ = 12726417600. Its totient is φ = 985268736.

The previous prime is 3900026597. The next prime is 3900026653. The reversal of 3900026640 is 466200093.

3900026640 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 3900026598 and 3900026607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423075 + ... + 432194.

It is an arithmetic number, because the mean of its divisors is an integer number (159080220).

Almost surely, 2^3900026640 is an apocalyptic number.

3900026640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3900026640 is an abundant number, since it is smaller than the sum of its proper divisors (8826390960).

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

3900026640 is a wasteful number, since it uses less digits than its factorization.

3900026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855304 (or 855298 counting only the distinct ones).

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

The square root of 3900026640 is about 62450.1932743206. The cubic root of 3900026640 is about 1574.0645006389.

The spelling of 3900026640 in words is "three billion, nine hundred million, twenty-six thousand, six hundred forty".