145809830 has 16 divisors (see below), whose sum is σ = 263460384. Its totient is φ = 58101120.

The previous prime is 145809823. The next prime is 145809847. The reversal of 145809830 is 38908541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25091 + ... + 30350.

It is an arithmetic number, because the mean of its divisors is an integer number (16466274).

Almost surely, 2^145809830 is an apocalyptic number.

145809830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145809830 is a deficient number, since it is larger than the sum of its proper divisors (117650554).

145809830 is a wasteful number, since it uses less digits than its factorization.

145809830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55711.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 145809830 is about 12075.1741188274. The cubic root of 145809830 is about 526.3350210464.

The spelling of 145809830 in words is "one hundred forty-five million, eight hundred nine thousand, eight hundred thirty".