145215408 has 80 divisors (see below), whose sum is σ = 417084416. Its totient is φ = 43234560.

The previous prime is 145215403. The next prime is 145215419. The reversal of 145215408 is 804512541.

It is not an unprimeable number, because it can be changed into a prime (145215401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15591 + ... + 23097.

Almost surely, 2^145215408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145215408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208542208).

145215408 is an abundant number, since it is smaller than the sum of its proper divisors (271869008).

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

145215408 is a wasteful number, since it uses less digits than its factorization.

145215408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7562 (or 7556 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 145215408 is about 12050.5355897570. The cubic root of 145215408 is about 525.6188113708.

Adding to 145215408 its reverse (804512541), we get a palindrome (949727949).

The spelling of 145215408 in words is "one hundred forty-five million, two hundred fifteen thousand, four hundred eight".