1330537638 has 16 divisors (see below), whose sum is σ = 2665615680. Its totient is φ = 442755816.

The previous prime is 1330537633. The next prime is 1330537679. The reversal of 1330537638 is 8367350331.

It is a super-2 number, since 2×1330537638² = 3540660812269238088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1330537596 and 1330537605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330537633) 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, 185368 + ... + 192411.

It is an arithmetic number, because the mean of its divisors is an integer number (166600980).

Almost surely, 2^1330537638 is an apocalyptic number.

1330537638 is an abundant number, since it is smaller than the sum of its proper divisors (1335078042).

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

1330537638 is a wasteful number, since it uses less digits than its factorization.

1330537638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378371.

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 1330537638 is about 36476.5354440358. The cubic root of 1330537638 is about 1099.8726127965.

Adding to 1330537638 its reverse (8367350331), we get a palindrome (9697887969).

The spelling of 1330537638 in words is "one billion, three hundred thirty million, five hundred thirty-seven thousand, six hundred thirty-eight".