145189970 has 16 divisors (see below), whose sum is σ = 261538200. Its totient is φ = 58032384.

The previous prime is 145189969. The next prime is 145189999. The reversal of 145189970 is 79981541.

It can be written as a sum of positive squares in 4 ways, for example, as 113188321 + 32001649 = 10639^2 + 5657^2 .

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, 10856 + ... + 20204.

Almost surely, 2^145189970 is an apocalyptic number.

145189970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145189970 is a deficient number, since it is larger than the sum of its proper divisors (116348230).

145189970 is a wasteful number, since it uses less digits than its factorization.

145189970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10909.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 145189970 is about 12049.4800717707. The cubic root of 145189970 is about 525.5881179517.

The spelling of 145189970 in words is "one hundred forty-five million, one hundred eighty-nine thousand, nine hundred seventy".