1260609780 has 48 divisors (see below), whose sum is σ = 3615804864. Its totient is φ = 327962880.

The previous prime is 1260609767. The next prime is 1260609781. The reversal of 1260609780 is 879060621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260609781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253762 + ... + 258681.

It is an arithmetic number, because the mean of its divisors is an integer number (75329268).

Almost surely, 2^1260609780 is an apocalyptic number.

1260609780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1260609780 is an abundant number, since it is smaller than the sum of its proper divisors (2355195084).

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

1260609780 is a wasteful number, since it uses less digits than its factorization.

1260609780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512496 (or 512494 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1260609780 is about 35505.0669623365. The cubic root of 1260609780 is about 1080.2565062888.

The spelling of 1260609780 in words is "one billion, two hundred sixty million, six hundred nine thousand, seven hundred eighty".