1373423616 has 144 divisors (see below), whose sum is σ = 3995819100. Its totient is φ = 454459392.

The previous prime is 1373423599. The next prime is 1373423651. The reversal of 1373423616 is 6163243731.

1373423616 is a `hidden beast` number, since 1 + 3 + 7 + 34 + 2 + 3 + 616 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1122518016 + 250905600 = 33504^2 + 15840^2 .

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4958070 + ... + 4958346.

Almost surely, 2^1373423616 is an apocalyptic number.

1373423616 is a gapful number since it is divisible by the number (16) 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 1373423616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997909550).

1373423616 is an abundant number, since it is smaller than the sum of its proper divisors (2622395484).

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

1373423616 is a wasteful number, since it uses less digits than its factorization.

1373423616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 551 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 1373423616 is about 37059.7303821817. The cubic root of 1373423616 is about 1111.5649316777.

The spelling of 1373423616 in words is "one billion, three hundred seventy-three million, four hundred twenty-three thousand, six hundred sixteen".