3640388 has 6 divisors (see below), whose sum is σ = 6370686. Its totient is φ = 1820192.

The previous prime is 3640379. The next prime is 3640391. The reversal of 3640388 is 8830463.

It can be written as a sum of positive squares in only one way, i.e., 3378244 + 262144 = 1838^2 + 512^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455045 + ... + 455052.

It is an arithmetic number, because the mean of its divisors is an integer number (1061781).

Almost surely, 2^3640388 is an apocalyptic number.

It is an amenable number.

3640388 is a deficient number, since it is larger than the sum of its proper divisors (2730298).

3640388 is a wasteful number, since it uses less digits than its factorization.

3640388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910101 (or 910099 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 3640388 is about 1907.9800837535. The cubic root of 3640388 is about 153.8328990888.

The spelling of 3640388 in words is "three million, six hundred forty thousand, three hundred eighty-eight".