145278816 has 24 divisors (see below), whose sum is σ = 381357144. Its totient is φ = 48426240.

The previous prime is 145278799. The next prime is 145278823. The reversal of 145278816 is 618872541.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×145278816² = 42211868756723712, 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756565 + ... + 756756.

It is an arithmetic number, because the mean of its divisors is an integer number (15889881).

Almost surely, 2^145278816 is an apocalyptic number.

145278816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

145278816 is an abundant number, since it is smaller than the sum of its proper divisors (236078328).

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

145278816 is a wasteful number, since it uses less digits than its factorization.

145278816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513334 (or 1513326 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 145278816 is about 12053.1662230304. The cubic root of 145278816 is about 525.6953036850.

The spelling of 145278816 in words is "one hundred forty-five million, two hundred seventy-eight thousand, eight hundred sixteen".