3780640 has 24 divisors (see below), whose sum is σ = 8932140. Its totient is φ = 1512192.

The previous prime is 3780619. The next prime is 3780653. The reversal of 3780640 is 460873.

It can be written as a sum of positive squares in 2 ways, for example, as 3196944 + 583696 = 1788^2 + 764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3780599 and 3780608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11655 + ... + 11974.

Almost surely, 2^3780640 is an apocalyptic number.

It is an amenable number.

3780640 is an abundant number, since it is smaller than the sum of its proper divisors (5151500).

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

3780640 is a wasteful number, since it uses less digits than its factorization.

3780640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23644 (or 23636 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 3780640 is about 1944.3867927961. The cubic root of 3780640 is about 155.7836140838.

The spelling of 3780640 in words is "three million, seven hundred eighty thousand, six hundred forty".