1020138580 has 24 divisors (see below), whose sum is σ = 2152452960. Its totient is φ = 406119840.

The previous prime is 1020138569. The next prime is 1020138593. The reversal of 1020138580 is 858310201.

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, 116650 + ... + 125089.

It is an arithmetic number, because the mean of its divisors is an integer number (89685540).

Almost surely, 2^1020138580 is an apocalyptic number.

1020138580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020138580 is an abundant number, since it is smaller than the sum of its proper divisors (1132314380).

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

1020138580 is a wasteful number, since it uses less digits than its factorization.

1020138580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241959 (or 241957 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1020138580 is about 31939.6083257137. The cubic root of 1020138580 is about 1006.6682950039.

Adding to 1020138580 its reverse (858310201), we get a palindrome (1878448781).

The spelling of 1020138580 in words is "one billion, twenty million, one hundred thirty-eight thousand, five hundred eighty".