12597780 has 96 divisors (see below), whose sum is σ = 39287808. Its totient is φ = 2995200.

The previous prime is 12597773. The next prime is 12597791. The reversal of 12597780 is 8779521.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23920 + ... + 24440.

It is an arithmetic number, because the mean of its divisors is an integer number (409248).

Almost surely, 2^12597780 is an apocalyptic number.

12597780 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 12597780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19643904).

12597780 is an abundant number, since it is smaller than the sum of its proper divisors (26690028).

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

12597780 is a wasteful number, since it uses less digits than its factorization.

12597780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 12597780 is about 3549.3351490103. The cubic root of 12597780 is about 232.6830100296.

The spelling of 12597780 in words is "twelve million, five hundred ninety-seven thousand, seven hundred eighty".