1025660340 has 48 divisors (see below), whose sum is σ = 3190944960. Its totient is φ = 273509280.

The previous prime is 1025660333. The next prime is 1025660347. The reversal of 1025660340 is 430665201.

1025660340 is a `hidden beast` number, since 1 + 0 + 2 + 56 + 603 + 4 + 0 = 666.

1025660340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1025660333) and next prime (1025660347).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025660347) 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, 949146 + ... + 950225.

It is an arithmetic number, because the mean of its divisors is an integer number (66478020).

Almost surely, 2^1025660340 is an apocalyptic number.

1025660340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025660340 is an abundant number, since it is smaller than the sum of its proper divisors (2165284620).

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

1025660340 is a wasteful number, since it uses less digits than its factorization.

1025660340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899389 (or 1899381 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1025660340 is about 32025.9323049306. The cubic root of 1025660340 is about 1008.4813106749.

The spelling of 1025660340 in words is "one billion, twenty-five million, six hundred sixty thousand, three hundred forty".