3689078640 has 80 divisors (see below), whose sum is σ = 12315857568. Its totient is φ = 908080128.

The previous prime is 3689078623. The next prime is 3689078681. The reversal of 3689078640 is 468709863.

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

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 588079 + ... + 594318.

Almost surely, 2^3689078640 is an apocalyptic number.

3689078640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3689078640 is an abundant number, since it is smaller than the sum of its proper divisors (8626778928).

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

3689078640 is a wasteful number, since it uses less digits than its factorization.

3689078640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182426 (or 1182420 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 3689078640 is about 60737.7859326466. The cubic root of 3689078640 is about 1545.1570854409.

The spelling of 3689078640 in words is "three billion, six hundred eighty-nine million, seventy-eight thousand, six hundred forty".