145905446 has 16 divisors (see below), whose sum is σ = 230722800. Its totient is φ = 69009408.

The previous prime is 145905421. The next prime is 145905469. The reversal of 145905446 is 644509541.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26726 + ... + 31718.

It is an arithmetic number, because the mean of its divisors is an integer number (14420175).

Almost surely, 2^145905446 is an apocalyptic number.

145905446 is a deficient number, since it is larger than the sum of its proper divisors (84817354).

145905446 is a wasteful number, since it uses less digits than its factorization.

145905446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5783.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 145905446 is about 12079.1326675387. The cubic root of 145905446 is about 526.4500454194.

The spelling of 145905446 in words is "one hundred forty-five million, nine hundred five thousand, four hundred forty-six".