145909404 has 48 divisors (see below), whose sum is σ = 378954240. Its totient is φ = 48550320.

The previous prime is 145909399. The next prime is 145909409. The reversal of 145909404 is 404909541.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (145909399) and next prime (145909409).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145909409) by changing a digit.

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, 97647 + ... + 99129.

It is an arithmetic number, because the mean of its divisors is an integer number (7894880).

Almost surely, 2^145909404 is an apocalyptic number.

It is an amenable number.

145909404 is an abundant number, since it is smaller than the sum of its proper divisors (233044836).

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

145909404 is a wasteful number, since it uses less digits than its factorization.

145909404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 145909404 is about 12079.2965026942. The cubic root of 145909404 is about 526.4548057407.

The spelling of 145909404 in words is "one hundred forty-five million, nine hundred nine thousand, four hundred four".