145228650 has 72 divisors (see below), whose sum is σ = 418991040. Its totient is φ = 33193440.

The previous prime is 145228649. The next prime is 145228697. The reversal of 145228650 is 56822541.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2530 + ... + 17229.

It is an arithmetic number, because the mean of its divisors is an integer number (5819320).

Almost surely, 2^145228650 is an apocalyptic number.

145228650 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 145228650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209495520).

145228650 is an abundant number, since it is smaller than the sum of its proper divisors (273762390).

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

145228650 is a wasteful number, since it uses less digits than its factorization.

145228650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19788 (or 19776 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 145228650 is about 12051.0850133919. The cubic root of 145228650 is about 525.6347877120.

The spelling of 145228650 in words is "one hundred forty-five million, two hundred twenty-eight thousand, six hundred fifty".