145993090 has 16 divisors (see below), whose sum is σ = 264680640. Its totient is φ = 57976560.

The previous prime is 145993079. The next prime is 145993097. The reversal of 145993090 is 90399541.

It is not an unprimeable number, because it can be changed into a prime (145993097) by changing a digit.

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, 51126 + ... + 53905.

It is an arithmetic number, because the mean of its divisors is an integer number (16542540).

Almost surely, 2^145993090 is an apocalyptic number.

145993090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145993090 is a deficient number, since it is larger than the sum of its proper divisors (118687550).

145993090 is a wasteful number, since it uses less digits than its factorization.

145993090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105177.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 145993090 is about 12082.7600323767. The cubic root of 145993090 is about 526.5554354818. Note that the first 3 decimals are identical.

It can be divided in two parts, 14599 and 3090, that added together give a square (17689 = 133²).

The spelling of 145993090 in words is "one hundred forty-five million, nine hundred ninety-three thousand, ninety".