1577272240 has 160 divisors (see below), whose sum is σ = 3999119040. Its totient is φ = 576356352.

The previous prime is 1577272217. The next prime is 1577272241. The reversal of 1577272240 is 422727751.

It is a self number, because there is not a number n which added to its sum of digits gives 1577272240.

It is not an unprimeable number, because it can be changed into a prime (1577272241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10046242 + ... + 10046398.

It is an arithmetic number, because the mean of its divisors is an integer number (24994494).

Almost surely, 2^1577272240 is an apocalyptic number.

1577272240 is a gapful number since it is divisible by the number (10) 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 1577272240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1999559520).

1577272240 is an abundant number, since it is smaller than the sum of its proper divisors (2421846800).

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

1577272240 is a wasteful number, since it uses less digits than its factorization.

1577272240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 37.

The square root of 1577272240 is about 39714.8868813698. The cubic root of 1577272240 is about 1164.0426329531.

Adding to 1577272240 its reverse (422727751), we get a palindrome (1999999991).

The spelling of 1577272240 in words is "one billion, five hundred seventy-seven million, two hundred seventy-two thousand, two hundred forty".