145775904 has 96 divisors (see below), whose sum is σ = 405720000. Its totient is φ = 45702144.

The previous prime is 145775897. The next prime is 145775921. The reversal of 145775904 is 409577541.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×145775904² = 42501228374034432, which contains 22 as substring.

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, 417522 + ... + 417870.

It is an arithmetic number, because the mean of its divisors is an integer number (4226250).

Almost surely, 2^145775904 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 145775904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202860000).

145775904 is an abundant number, since it is smaller than the sum of its proper divisors (259944096).

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

145775904 is a wasteful number, since it uses less digits than its factorization.

145775904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 145775904 is about 12073.7692540482. The cubic root of 145775904 is about 526.2941965766.

The spelling of 145775904 in words is "one hundred forty-five million, seven hundred seventy-five thousand, nine hundred four".