1078640925 has 36 divisors (see below), whose sum is σ = 1882200960. Its totient is φ = 544983840.

The previous prime is 1078640921. The next prime is 1078640947. The reversal of 1078640925 is 5290468701.

It is not a de Polignac number, because 1078640925 - 2² = 1078640921 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078640921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7156 + ... + 46994.

It is an arithmetic number, because the mean of its divisors is an integer number (52283360).

Almost surely, 2^1078640925 is an apocalyptic number.

1078640925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1078640925 is a deficient number, since it is larger than the sum of its proper divisors (803560035).

1078640925 is a wasteful number, since it uses less digits than its factorization.

1078640925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39890 (or 39866 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1078640925 is about 32842.6692733706. The cubic root of 1078640925 is about 1025.5550196582. Note that the first 3 decimals are identical.

The spelling of 1078640925 in words is "one billion, seventy-eight million, six hundred forty thousand, nine hundred twenty-five".