145705230 has 224 divisors, whose sum is σ = 453288960. Its totient is φ = 33359040.

The previous prime is 145705229. The next prime is 145705303. The reversal of 145705230 is 32507541.

It is a happy number.

145705230 is a `hidden beast` number, since 14 + 570 + 52 + 30 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 145705194 and 145705203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1844331 + ... + 1844409.

Almost surely, 2^145705230 is an apocalyptic number.

145705230 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 145705230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226644480).

145705230 is an abundant number, since it is smaller than the sum of its proper divisors (307583730).

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

145705230 is a wasteful number, since it uses less digits than its factorization.

145705230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 145705230 is about 12070.8421412924. The cubic root of 145705230 is about 526.2091314696.

The spelling of 145705230 in words is "one hundred forty-five million, seven hundred five thousand, two hundred thirty".