1260356640 has 96 divisors (see below), whose sum is σ = 4179107520. Its totient is φ = 318403584.

The previous prime is 1260356639. The next prime is 1260356681. The reversal of 1260356640 is 466530621.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59979 + ... + 78218.

It is an arithmetic number, because the mean of its divisors is an integer number (43532370).

Almost surely, 2^1260356640 is an apocalyptic number.

1260356640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1260356640 is an abundant number, since it is smaller than the sum of its proper divisors (2918750880).

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

1260356640 is a wasteful number, since it uses less digits than its factorization.

1260356640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138234 (or 138226 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1260356640 is about 35501.5019400588. The cubic root of 1260356640 is about 1080.1841935498.

The spelling of 1260356640 in words is "one billion, two hundred sixty million, three hundred fifty-six thousand, six hundred forty".