4000356 has 18 divisors (see below), whose sum is σ = 10112102. Its totient is φ = 1333440.

The previous prime is 4000343. The next prime is 4000357. The reversal of 4000356 is 6530004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3481956 + 518400 = 1866^2 + 720^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (4000357) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55525 + ... + 55596.

Almost surely, 2^4000356 is an apocalyptic number.

It is an amenable number.

4000356 is an abundant number, since it is smaller than the sum of its proper divisors (6111746).

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

4000356 is a wasteful number, since it uses less digits than its factorization.

4000356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111131 (or 111126 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 4000356 is about 2000.0889980198. The cubic root of 4000356 is about 158.7448143469.

It can be divided in two parts, 4000 and 356, that added together give a square (4356 = 66²).

The spelling of 4000356 in words is "four million, three hundred fifty-six", and thus it is an aban number.