145298820 has 96 divisors (see below), whose sum is σ = 427392000. Its totient is φ = 36812160.

The previous prime is 145298809. The next prime is 145298861. The reversal of 145298820 is 28892541.

It is a super-2 number, since 2×145298820² = 42223494186784800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290931 + ... + 291429.

It is an arithmetic number, because the mean of its divisors is an integer number (4452000).

Almost surely, 2^145298820 is an apocalyptic number.

145298820 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 145298820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213696000).

145298820 is an abundant number, since it is smaller than the sum of its proper divisors (282093180).

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

145298820 is a wasteful number, since it uses less digits than its factorization.

145298820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 145298820 is about 12053.9960179187. The cubic root of 145298820 is about 525.7194309150.

The spelling of 145298820 in words is "one hundred forty-five million, two hundred ninety-eight thousand, eight hundred twenty".