1283732172 has 24 divisors (see below), whose sum is σ = 3328194800. Its totient is φ = 427910688.

The previous prime is 1283732171. The next prime is 1283732209. The reversal of 1283732172 is 2712373821.

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 (1283732171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5943097 + ... + 5943312.

Almost surely, 2^1283732172 is an apocalyptic number.

1283732172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1283732172 is an abundant number, since it is smaller than the sum of its proper divisors (2044462628).

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

1283732172 is a wasteful number, since it uses less digits than its factorization.

1283732172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11886422 (or 11886414 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 1283732172 is about 35829.2083641266. The cubic root of 1283732172 is about 1086.8213011319.

The spelling of 1283732172 in words is "one billion, two hundred eighty-three million, seven hundred thirty-two thousand, one hundred seventy-two".