3661400 has 24 divisors (see below), whose sum is σ = 8513220. Its totient is φ = 1464480.

The previous prime is 3661391. The next prime is 3661417. The reversal of 3661400 is 41663.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8954 + ... + 9353.

Almost surely, 2^3661400 is an apocalyptic number.

It is an amenable number.

3661400 is an abundant number, since it is smaller than the sum of its proper divisors (4851820).

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

3661400 is a wasteful number, since it uses less digits than its factorization.

3661400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18323 (or 18314 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3661400 is about 1913.4785078490. The cubic root of 3661400 is about 154.1283014671.

The spelling of 3661400 in words is "three million, six hundred sixty-one thousand, four hundred".