1025638471 has 24 divisors (see below), whose sum is σ = 1266904800. Its totient is φ = 823225920.

The previous prime is 1025638463. The next prime is 1025638489. The reversal of 1025638471 is 1748365201.

It is not a de Polignac number, because 1025638471 - 2³ = 1025638463 is a prime.

It is a super-3 number, since 3×1025638471³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1025638471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025638571) 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 23 ways as a sum of consecutive naturals, for example, 22005 + ... + 50353.

It is an arithmetic number, because the mean of its divisors is an integer number (52787700).

Almost surely, 2^1025638471 is an apocalyptic number.

1025638471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1025638471 is a deficient number, since it is larger than the sum of its proper divisors (241266329).

1025638471 is a wasteful number, since it uses less digits than its factorization.

1025638471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28407 (or 28396 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1025638471 is about 32025.5908766724. The cubic root of 1025638471 is about 1008.4741430537.

The spelling of 1025638471 in words is "one billion, twenty-five million, six hundred thirty-eight thousand, four hundred seventy-one".