1161423450 has 288 divisors, whose sum is σ = 3666461760. Its totient is φ = 260582400.

The previous prime is 1161423443. The next prime is 1161423457. The reversal of 1161423450 is 543241611.

It is a happy number.

1161423450 is a `hidden beast` number, since 1 + 1 + 614 + 2 + 3 + 45 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1161423443) and next prime (1161423457).

It is not an unprimeable number, because it can be changed into a prime (1161423457) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4984534 + ... + 4984766.

It is an arithmetic number, because the mean of its divisors is an integer number (12730770).

Almost surely, 2^1161423450 is an apocalyptic number.

1161423450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161423450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1833230880).

1161423450 is an abundant number, since it is smaller than the sum of its proper divisors (2505038310).

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

1161423450 is a wasteful number, since it uses less digits than its factorization.

1161423450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1161423450 is about 34079.6632905902. The cubic root of 1161423450 is about 1051.1471815600.

The spelling of 1161423450 in words is "one billion, one hundred sixty-one million, four hundred twenty-three thousand, four hundred fifty".