145947864 has 64 divisors (see below), whose sum is σ = 378483840. Its totient is φ = 46864640.

The previous prime is 145947859. The next prime is 145947871. The reversal of 145947864 is 468749541.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

Its product of digits (967680) is a multiple of the sum of its prime factors (1920).

It is a congruent 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, 80779 + ... + 82565.

It is an arithmetic number, because the mean of its divisors is an integer number (5913810).

Almost surely, 2^145947864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145947864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189241920).

145947864 is an abundant number, since it is smaller than the sum of its proper divisors (232535976).

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

145947864 is a wasteful number, since it uses less digits than its factorization.

145947864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920 (or 1916 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 145947864 is about 12080.8883779298. Note that the first 3 decimals coincide. The cubic root of 145947864 is about 526.5010574388.

The spelling of 145947864 in words is "one hundred forty-five million, nine hundred forty-seven thousand, eight hundred sixty-four".