145599290 has 32 divisors (see below), whose sum is σ = 269096256. Its totient is φ = 56689920.

The previous prime is 145599263. The next prime is 145599301. The reversal of 145599290 is 92995541.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245234 + ... + 245826.

It is an arithmetic number, because the mean of its divisors is an integer number (8409258).

Almost surely, 2^145599290 is an apocalyptic number.

145599290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145599290 is a deficient number, since it is larger than the sum of its proper divisors (123496966).

145599290 is a wasteful number, since it uses less digits than its factorization.

145599290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 145800, while the sum is 44.

The square root of 145599290 is about 12066.4530828243. The cubic root of 145599290 is about 526.0815677309.

The spelling of 145599290 in words is "one hundred forty-five million, five hundred ninety-nine thousand, two hundred ninety".