1061087380 has 48 divisors (see below), whose sum is σ = 2361396240. Its totient is φ = 399795200.

The previous prime is 1061087353. The next prime is 1061087381. The reversal of 1061087380 is 837801601.

It can be written as a sum of positive squares in 8 ways, for example, as 21904 + 1061065476 = 148^2 + 32574^2 .

It is a super-2 number, since 2×1061087380² = 2251812855990528800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061087381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470 + ... + 46090.

It is an arithmetic number, because the mean of its divisors is an integer number (49195755).

Almost surely, 2^1061087380 is an apocalyptic number.

1061087380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1061087380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180698120).

1061087380 is an abundant number, since it is smaller than the sum of its proper divisors (1300308860).

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

1061087380 is a wasteful number, since it uses less digits than its factorization.

1061087380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44700 (or 44698 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1061087380 is about 32574.3362173353. The cubic root of 1061087380 is about 1019.9613531429.

Adding to 1061087380 its reverse (837801601), we get a palindrome (1898888981).

The spelling of 1061087380 in words is "one billion, sixty-one million, eighty-seven thousand, three hundred eighty".