1381653044 has 24 divisors (see below), whose sum is σ = 2443120680. Its totient is φ = 683634816.

The previous prime is 1381652983. The next prime is 1381653067. The reversal of 1381653044 is 4403561831.

It can be written as a sum of positive squares in 4 ways, for example, as 11764900 + 1369888144 = 3430^2 + 37012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1381652995 and 1381653013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485594 + ... + 488430.

It is an arithmetic number, because the mean of its divisors is an integer number (101796695).

Almost surely, 2^1381653044 is an apocalyptic number.

It is an amenable number.

1381653044 is a deficient number, since it is larger than the sum of its proper divisors (1061467636).

1381653044 is a wasteful number, since it uses less digits than its factorization.

1381653044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067 (or 4065 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1381653044 is about 37170.5938074710. The cubic root of 1381653044 is about 1113.7806437203.

The spelling of 1381653044 in words is "one billion, three hundred eighty-one million, six hundred fifty-three thousand, forty-four".