1257960798 has 24 divisors (see below), whose sum is σ = 2885910768. Its totient is φ = 394654272.

The previous prime is 1257960793. The next prime is 1257960839. The reversal of 1257960798 is 8970697521.

1257960798 is a `hidden beast` number, since 1 + 2 + 579 + 60 + 7 + 9 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257960793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2055186 + ... + 2055797.

It is an arithmetic number, because the mean of its divisors is an integer number (120246282).

Almost surely, 2^1257960798 is an apocalyptic number.

1257960798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1257960798 is an abundant number, since it is smaller than the sum of its proper divisors (1627949970).

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

1257960798 is a wasteful number, since it uses less digits than its factorization.

1257960798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111008 (or 4111005 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The square root of 1257960798 is about 35467.7430632399. The cubic root of 1257960798 is about 1079.4993100962.

The spelling of 1257960798 in words is "one billion, two hundred fifty-seven million, nine hundred sixty thousand, seven hundred ninety-eight".