12153780 has 96 divisors (see below), whose sum is σ = 38465280. Its totient is φ = 3185280.

The previous prime is 12153763. The next prime is 12153803. The reversal of 12153780 is 8735121.

12153780 is a `hidden beast` number, since 121 + 537 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 38182 + ... + 38498.

It is an arithmetic number, because the mean of its divisors is an integer number (400680).

Almost surely, 2^12153780 is an apocalyptic number.

12153780 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 12153780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19232640).

12153780 is an abundant number, since it is smaller than the sum of its proper divisors (26311500).

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

12153780 is a wasteful number, since it uses less digits than its factorization.

12153780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12153780 is about 3486.2271870892. The cubic root of 12153780 is about 229.9166679840.

The spelling of 12153780 in words is "twelve million, one hundred fifty-three thousand, seven hundred eighty".