1258732998 has 12 divisors (see below), whose sum is σ = 2727254868. Its totient is φ = 419577660.

The previous prime is 1258732973. The next prime is 1258732999. The reversal of 1258732998 is 8992378521.

1258732998 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258732999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34964788 + ... + 34964823.

It is an arithmetic number, because the mean of its divisors is an integer number (227271239).

Almost surely, 2^1258732998 is an apocalyptic number.

1258732998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1258732998 is an abundant number, since it is smaller than the sum of its proper divisors (1468521870).

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

1258732998 is a wasteful number, since it uses less digits than its factorization.

1258732998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69929619 (or 69929616 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 1258732998 is about 35478.6273409781. The cubic root of 1258732998 is about 1079.7201486842.

The spelling of 1258732998 in words is "one billion, two hundred fifty-eight million, seven hundred thirty-two thousand, nine hundred ninety-eight".