1600444720 has 40 divisors (see below), whose sum is σ = 4252611744. Its totient is φ = 548723712.

The previous prime is 1600444633. The next prime is 1600444723. The reversal of 1600444720 is 274440061.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1600444720² = 5122846603551756800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1600444723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428409 + ... + 1429528.

Almost surely, 2^1600444720 is an apocalyptic number.

1600444720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1600444720 is an abundant number, since it is smaller than the sum of its proper divisors (2652167024).

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

1600444720 is a wasteful number, since it uses less digits than its factorization.

1600444720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857957 (or 2857951 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1600444720 is about 40005.5586137727. The cubic root of 1600444720 is about 1169.7154493441.

Adding to 1600444720 its reverse (274440061), we get a palindrome (1874884781).

The spelling of 1600444720 in words is "one billion, six hundred million, four hundred forty-four thousand, seven hundred twenty".