1025813340 has 72 divisors (see below), whose sum is σ = 3246935328. Its totient is φ = 261655680.

The previous prime is 1025813333. The next prime is 1025813407. The reversal of 1025813340 is 433185201.

It is a happy number.

1025813340 is a `hidden beast` number, since 10 + 2 + 581 + 33 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119751 + ... + 128030.

It is an arithmetic number, because the mean of its divisors is an integer number (45096324).

Almost surely, 2^1025813340 is an apocalyptic number.

1025813340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025813340 is an abundant number, since it is smaller than the sum of its proper divisors (2221121988).

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

1025813340 is a wasteful number, since it uses less digits than its factorization.

1025813340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247819 (or 247814 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1025813340 is about 32028.3209050990. The cubic root of 1025813340 is about 1008.5314539705.

Adding to 1025813340 its reverse (433185201), we get a palindrome (1458998541).

The spelling of 1025813340 in words is "one billion, twenty-five million, eight hundred thirteen thousand, three hundred forty".