1258227840 has 128 divisors (see below), whose sum is σ = 4070877120. Its totient is φ = 330485760.

The previous prime is 1258227829. The next prime is 1258227911. The reversal of 1258227840 is 487228521.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123750 + ... + 133530.

Almost surely, 2^1258227840 is an apocalyptic number.

1258227840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1258227840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2035438560).

1258227840 is an abundant number, since it is smaller than the sum of its proper divisors (2812649280).

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

1258227840 is an equidigital number, since it uses as much as digits as its factorization.

1258227840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870 (or 9858 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 1258227840 is about 35471.5074390700. The cubic root of 1258227840 is about 1079.5756906584.

The spelling of 1258227840 in words is "one billion, two hundred fifty-eight million, two hundred twenty-seven thousand, eight hundred forty".