1352720772 has 36 divisors (see below), whose sum is σ = 3682407820. Its totient is φ = 416221632.

The previous prime is 1352720737. The next prime is 1352720773. The reversal of 1352720772 is 2770272531.

It can be written as a sum of positive squares in 2 ways, for example, as 872847936 + 479872836 = 29544^2 + 21906^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1352720773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1444747 + ... + 1445682.

Almost surely, 2^1352720772 is an apocalyptic number.

1352720772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1352720772 is an abundant number, since it is smaller than the sum of its proper divisors (2329687048).

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

1352720772 is a wasteful number, since it uses less digits than its factorization.

1352720772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890452 (or 2890447 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 1352720772 is about 36779.3525228490. The cubic root of 1352720772 is about 1105.9514261548.

The spelling of 1352720772 in words is "one billion, three hundred fifty-two million, seven hundred twenty thousand, seven hundred seventy-two".