1618413732 has 36 divisors (see below), whose sum is σ = 4405683100. Its totient is φ = 497973312.

The previous prime is 1618413721. The next prime is 1618413737. The reversal of 1618413732 is 2373148161.

It is a happy number.

1618413732 is a `hidden beast` number, since 1 + 618 + 4 + 1 + 3 + 7 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 220700736 + 1397712996 = 14856^2 + 37386^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1618413737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1728607 + ... + 1729542.

Almost surely, 2^1618413732 is an apocalyptic number.

1618413732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1618413732 is an abundant number, since it is smaller than the sum of its proper divisors (2787269368).

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

1618413732 is a wasteful number, since it uses less digits than its factorization.

1618413732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458172 (or 3458167 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1618413732 is about 40229.5131961599. The cubic root of 1618413732 is about 1174.0768320251.

The spelling of 1618413732 in words is "one billion, six hundred eighteen million, four hundred thirteen thousand, seven hundred thirty-two".