145688390 has 32 divisors (see below), whose sum is σ = 277089120. Its totient is φ = 54998784.

The previous prime is 145688383. The next prime is 145688393. The reversal of 145688390 is 93886541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145688393) 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 15 ways as a sum of consecutive naturals, for example, 54362 + ... + 56978.

It is an arithmetic number, because the mean of its divisors is an integer number (8659035).

Almost surely, 2^145688390 is an apocalyptic number.

145688390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145688390 is a deficient number, since it is larger than the sum of its proper divisors (131400730).

145688390 is a wasteful number, since it uses less digits than its factorization.

145688390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 145688390 is about 12070.1445724565. The cubic root of 145688390 is about 526.1888583397.

The spelling of 145688390 in words is "one hundred forty-five million, six hundred eighty-eight thousand, three hundred ninety".