1025638470 has 64 divisors (see below), whose sum is σ = 2768048640. Its totient is φ = 270202464.

The previous prime is 1025638463. The next prime is 1025638489. The reversal of 1025638470 is 748365201.

1025638470 is a `hidden beast` number, since 10 + 2 + 5 + 638 + 4 + 7 + 0 = 666.

It is a super-3 number, since 3×1025638470³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474 + ... + 45293.

It is an arithmetic number, because the mean of its divisors is an integer number (43250760).

Almost surely, 2^1025638470 is an apocalyptic number.

1025638470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025638470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1384024320).

1025638470 is an abundant number, since it is smaller than the sum of its proper divisors (1742410170).

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

1025638470 is a wasteful number, since it uses less digits than its factorization.

1025638470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45866 (or 45860 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1025638470 is about 32025.5908610598. The cubic root of 1025638470 is about 1008.4741427259.

The spelling of 1025638470 in words is "one billion, twenty-five million, six hundred thirty-eight thousand, four hundred seventy".