145403904 has 52 divisors (see below), whose sum is σ = 387729176. Its totient is φ = 48463872.

The previous prime is 145403897. The next prime is 145403911. The reversal of 145403904 is 409304541.

It is an interprime number because it is at equal distance from previous prime (145403897) and next prime (145403911).

It is a super-2 number, since 2×145403904² = 42284590596882432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6372 + ... + 18204.

Almost surely, 2^145403904 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 145403904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193864588).

145403904 is an abundant number, since it is smaller than the sum of its proper divisors (242325272).

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

145403904 is an equidigital number, since it uses as much as digits as its factorization.

145403904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11860 (or 11838 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 145403904 is about 12058.3541165451. The cubic root of 145403904 is about 525.8461385002.

The spelling of 145403904 in words is "one hundred forty-five million, four hundred three thousand, nine hundred four".