145905408 has 288 divisors, whose sum is σ = 500371200. Its totient is φ = 41472000.

The previous prime is 145905401. The next prime is 145905421. The reversal of 145905408 is 804509541.

145905408 is a `hidden beast` number, since 14 + 590 + 54 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145905401) 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, 1444558 + ... + 1444658.

It is an arithmetic number, because the mean of its divisors is an integer number (1737400).

Almost surely, 2^145905408 is an apocalyptic number.

145905408 is a gapful number since it is divisible by the number (18) 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 145905408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250185600).

145905408 is an abundant number, since it is smaller than the sum of its proper divisors (354465792).

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

145905408 is a wasteful number, since it uses less digits than its factorization.

145905408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 145905408 is about 12079.1310945780. The cubic root of 145905408 is about 526.4499997160.

The spelling of 145905408 in words is "one hundred forty-five million, nine hundred five thousand, four hundred eight".