145389894 has 32 divisors (see below), whose sum is σ = 319818240. Its totient is φ = 43782432.

The previous prime is 145389889. The next prime is 145389911. The reversal of 145389894 is 498983541.

It is a super-2 number, since 2×145389894² = 42276442554662472, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 16164 + ... + 23495.

It is an arithmetic number, because the mean of its divisors is an integer number (9994320).

Almost surely, 2^145389894 is an apocalyptic number.

145389894 is an abundant number, since it is smaller than the sum of its proper divisors (174428346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145389894 is a wasteful number, since it uses less digits than its factorization.

145389894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39724.

The product of its digits is 1244160, while the sum is 51.

The square root of 145389894 is about 12057.7731774984. The cubic root of 145389894 is about 525.8292491302.

The spelling of 145389894 in words is "one hundred forty-five million, three hundred eighty-nine thousand, eight hundred ninety-four".