145278804 has 96 divisors (see below), whose sum is σ = 396047232. Its totient is φ = 40960000.

The previous prime is 145278799. The next prime is 145278823. The reversal of 145278804 is 408872541.

It is a happy number.

It is a super-2 number, since 2×145278804² = 42211861783340832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226324 + ... + 226964.

It is an arithmetic number, because the mean of its divisors is an integer number (4125492).

Almost surely, 2^145278804 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 145278804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198023616).

145278804 is an abundant number, since it is smaller than the sum of its proper divisors (250768428).

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

145278804 is a wasteful number, since it uses less digits than its factorization.

145278804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 145278804 is about 12053.1657252358. The cubic root of 145278804 is about 525.6952892108.

The spelling of 145278804 in words is "one hundred forty-five million, two hundred seventy-eight thousand, eight hundred four".