1406636652 has 48 divisors (see below), whose sum is σ = 3465338240. Its totient is φ = 442858752.

The previous prime is 1406636639. The next prime is 1406636653. The reversal of 1406636652 is 2566366041.

It is a self number, because there is not a number n which added to its sum of digits gives 1406636652.

It is not an unprimeable number, because it can be changed into a prime (1406636653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67683 + ... + 85989.

Almost surely, 2^1406636652 is an apocalyptic number.

1406636652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1406636652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1732669120).

1406636652 is an abundant number, since it is smaller than the sum of its proper divisors (2058701588).

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

1406636652 is a wasteful number, since it uses less digits than its factorization.

1406636652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18670 (or 18668 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1406636652 is about 37505.1550056789. The cubic root of 1406636652 is about 1120.4538583622.

The spelling of 1406636652 in words is "one billion, four hundred six million, six hundred thirty-six thousand, six hundred fifty-two".