145544620 has 96 divisors (see below), whose sum is σ = 345744000. Its totient is φ = 51093504.

The previous prime is 145544611. The next prime is 145544627. The reversal of 145544620 is 26445541.

It is a happy number.

145544620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (145544627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 731281 + ... + 731479.

It is an arithmetic number, because the mean of its divisors is an integer number (3601500).

Almost surely, 2^145544620 is an apocalyptic number.

145544620 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 145544620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172872000).

145544620 is an abundant number, since it is smaller than the sum of its proper divisors (200199380).

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

145544620 is a wasteful number, since it uses less digits than its factorization.

145544620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 145544620 is about 12064.1874985429. The cubic root of 145544620 is about 526.0157146630.

The spelling of 145544620 in words is "one hundred forty-five million, five hundred forty-four thousand, six hundred twenty".