1561928448 has 72 divisors (see below), whose sum is σ = 4401574128. Its totient is φ = 490012672.

The previous prime is 1561928437. The next prime is 1561928449. The reversal of 1561928448 is 8448291651.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1561928397 and 1561928406.

It is not an unprimeable number, because it can be changed into a prime (1561928449) 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 7 ways as a sum of consecutive naturals, for example, 46761 + ... + 72872.

It is an arithmetic number, because the mean of its divisors is an integer number (61132974).

Almost surely, 2^1561928448 is an apocalyptic number.

It is an amenable number.

1561928448 is an abundant number, since it is smaller than the sum of its proper divisors (2839645680).

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

1561928448 is a wasteful number, since it uses less digits than its factorization.

1561928448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119669 (or 119655 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 1561928448 is about 39521.2404663619. The cubic root of 1561928448 is about 1160.2557026475.

The spelling of 1561928448 in words is "one billion, five hundred sixty-one million, nine hundred twenty-eight thousand, four hundred forty-eight".