1618252944 has 320 divisors, whose sum is σ = 5459650560. Its totient is φ = 400896000.

The previous prime is 1618252919. The next prime is 1618252949. The reversal of 1618252944 is 4492528161.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1618252896 and 1618252905.

It is not an unprimeable number, because it can be changed into a prime (1618252949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8940534 + ... + 8940714.

It is an arithmetic number, because the mean of its divisors is an integer number (17061408).

Almost surely, 2^1618252944 is an apocalyptic number.

1618252944 is a gapful number since it is divisible by the number (14) 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 1618252944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2729825280).

1618252944 is an abundant number, since it is smaller than the sum of its proper divisors (3841397616).

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

1618252944 is a wasteful number, since it uses less digits than its factorization.

1618252944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 304 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 1618252944 is about 40227.5147629082. The cubic root of 1618252944 is about 1174.0379495659.

The spelling of 1618252944 in words is "one billion, six hundred eighteen million, two hundred fifty-two thousand, nine hundred forty-four".