1372713228 has 18 divisors (see below), whose sum is σ = 3469914084. Its totient is φ = 457571064.

The previous prime is 1372713157. The next prime is 1372713233. The reversal of 1372713228 is 8223172731.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 38130923 = 1372713228 / (1 + 3 + 7 + 2 + 7 + 1 + 3 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1372713192 and 1372713201.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19065426 + ... + 19065497.

Almost surely, 2^1372713228 is an apocalyptic number.

1372713228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1372713228 is an abundant number, since it is smaller than the sum of its proper divisors (2097200856).

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

1372713228 is a wasteful number, since it uses less digits than its factorization.

1372713228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38130933 (or 38130928 counting only the distinct ones).

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

The square root of 1372713228 is about 37050.1447770451. The cubic root of 1372713228 is about 1111.3732504505.

Adding to 1372713228 its reverse (8223172731), we get a palindrome (9595885959).

The spelling of 1372713228 in words is "one billion, three hundred seventy-two million, seven hundred thirteen thousand, two hundred twenty-eight".