1501161728 has 72 divisors (see below), whose sum is σ = 3441033120. Its totient is φ = 646410240.

The previous prime is 1501161719. The next prime is 1501161773. The reversal of 1501161728 is 8271611051.

It is a super-2 number, since 2×1501161728² = 4506973067223891968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1501161694 and 1501161703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39476 + ... + 67532.

Almost surely, 2^1501161728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1501161728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720516560).

1501161728 is an abundant number, since it is smaller than the sum of its proper divisors (1939871392).

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

1501161728 is a wasteful number, since it uses less digits than its factorization.

1501161728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28103 (or 28089 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 32.

The square root of 1501161728 is about 38744.8284032850. The cubic root of 1501161728 is about 1145.0096877577.

Adding to 1501161728 its reverse (8271611051), we get a palindrome (9772772779).

The spelling of 1501161728 in words is "one billion, five hundred one million, one hundred sixty-one thousand, seven hundred twenty-eight".