1230166440 has 80 divisors (see below), whose sum is σ = 4134736980. Its totient is φ = 328043520.

The previous prime is 1230166439. The next prime is 1230166447. The reversal of 1230166440 is 446610321.

1230166440 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 16 + 644 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1124529156 + 105637284 = 33534^2 + 10278^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1230166447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 186601 + ... + 193080.

Almost surely, 2^1230166440 is an apocalyptic number.

1230166440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230166440 is an abundant number, since it is smaller than the sum of its proper divisors (2904570540).

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

1230166440 is a wasteful number, since it uses less digits than its factorization.

1230166440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379704 (or 379691 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1230166440 is about 35073.7286298449. The cubic root of 1230166440 is about 1071.4895956100.

Adding to 1230166440 its reverse (446610321), we get a palindrome (1676776761).

The spelling of 1230166440 in words is "one billion, two hundred thirty million, one hundred sixty-six thousand, four hundred forty".