1672557520 has 20 divisors (see below), whose sum is σ = 3888696420. Its totient is φ = 669022976.

The previous prime is 1672557511. The next prime is 1672557521. The reversal of 1672557520 is 257552761.

It can be written as a sum of positive squares in 2 ways, for example, as 415996816 + 1256560704 = 20396^2 + 35448^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672557521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10453405 + ... + 10453564.

It is an arithmetic number, because the mean of its divisors is an integer number (194434821).

Almost surely, 2^1672557520 is an apocalyptic number.

1672557520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1672557520 is an abundant number, since it is smaller than the sum of its proper divisors (2216138900).

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

1672557520 is a wasteful number, since it uses less digits than its factorization.

1672557520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20906982 (or 20906976 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 1672557520 is about 40896.9133309593. The cubic root of 1672557520 is about 1187.0263347479.

The spelling of 1672557520 in words is "one billion, six hundred seventy-two million, five hundred fifty-seven thousand, five hundred twenty".