1025988749 has 8 divisors (see below), whose sum is σ = 1030224000. Its totient is φ = 1021761216.

The previous prime is 1025988731. The next prime is 1025988757. The reversal of 1025988749 is 9478895201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1025988749 - 2²⁰ = 1024940173 is a prime.

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 1025988749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025988349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512252 + ... + 514250.

It is an arithmetic number, because the mean of its divisors is an integer number (128778000).

Almost surely, 2^1025988749 is an apocalyptic number.

It is an amenable number.

1025988749 is a deficient number, since it is larger than the sum of its proper divisors (4235251).

1025988749 is a wasteful number, since it uses less digits than its factorization.

1025988749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The square root of 1025988749 is about 32031.0591301630. The cubic root of 1025988749 is about 1008.5889353220.

The spelling of 1025988749 in words is "one billion, twenty-five million, nine hundred eighty-eight thousand, seven hundred forty-nine".