145047820 has 24 divisors (see below), whose sum is σ = 304857504. Its totient is φ = 57970176.

The previous prime is 145047797. The next prime is 145047827. The reversal of 145047820 is 28740541.

It is not an unprimeable number, because it can be changed into a prime (145047827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29884 + ... + 34396.

It is an arithmetic number, because the mean of its divisors is an integer number (12702396).

Almost surely, 2^145047820 is an apocalyptic number.

145047820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145047820 is an abundant number, since it is smaller than the sum of its proper divisors (159809684).

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

145047820 is a wasteful number, since it uses less digits than its factorization.

145047820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6129 (or 6127 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 145047820 is about 12043.5800325319. The cubic root of 145047820 is about 525.4165341365.

The spelling of 145047820 in words is "one hundred forty-five million, forty-seven thousand, eight hundred twenty".