1025400188 has 24 divisors (see below), whose sum is σ = 1843405872. Its totient is φ = 498806784.

The previous prime is 1025400157. The next prime is 1025400193. The reversal of 1025400188 is 8810045201.

It is a self number, because there is not a number n which added to its sum of digits gives 1025400188.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32606 + ... + 55802.

It is an arithmetic number, because the mean of its divisors is an integer number (76808578).

Almost surely, 2^1025400188 is an apocalyptic number.

It is an amenable number.

1025400188 is a deficient number, since it is larger than the sum of its proper divisors (818005684).

1025400188 is a wasteful number, since it uses less digits than its factorization.

1025400188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23501 (or 23499 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 1025400188 is about 32021.8704637940. The cubic root of 1025400188 is about 1008.3960385809.

Adding to 1025400188 its reverse (8810045201), we get a palindrome (9835445389).

The spelling of 1025400188 in words is "one billion, twenty-five million, four hundred thousand, one hundred eighty-eight".