1381631048 has 24 divisors (see below), whose sum is σ = 3013507350. Its totient is φ = 592127424.

The previous prime is 1381631003. The next prime is 1381631059. The reversal of 1381631048 is 8401361831.

It can be written as a sum of positive squares in only one way, i.e., 1328019364 + 53611684 = 36442^2 + 7322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1381630999 and 1381631017.

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, 1761893 + ... + 1762676.

Almost surely, 2^1381631048 is an apocalyptic number.

It is an amenable number.

1381631048 is an abundant number, since it is smaller than the sum of its proper divisors (1631876302).

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

1381631048 is a wasteful number, since it uses less digits than its factorization.

1381631048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524589 (or 3524578 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1381631048 is about 37170.2979272429. The cubic root of 1381631048 is about 1113.7747332039.

Adding to 1381631048 its reverse (8401361831), we get a palindrome (9782992879).

The spelling of 1381631048 in words is "one billion, three hundred eighty-one million, six hundred thirty-one thousand, forty-eight".