146663640 has 96 divisors (see below), whose sum is σ = 497409120. Its totient is φ = 37407744.

The previous prime is 146663633. The next prime is 146663653. The reversal of 146663640 is 46366641.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 146663595 and 146663604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 577 + ... + 17136.

It is an arithmetic number, because the mean of its divisors is an integer number (5181345).

Almost surely, 2^146663640 is an apocalyptic number.

146663640 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 146663640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248704560).

146663640 is an abundant number, since it is smaller than the sum of its proper divisors (350745480).

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

146663640 is a wasteful number, since it uses less digits than its factorization.

146663640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17753 (or 17746 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 146663640 is about 12110.4764563579. The cubic root of 146663640 is about 527.3603652477.

The spelling of 146663640 in words is "one hundred forty-six million, six hundred sixty-three thousand, six hundred forty".