145890904 has 8 divisors (see below), whose sum is σ = 273545460. Its totient is φ = 72945448.

The previous prime is 145890883. The next prime is 145890919. The reversal of 145890904 is 409098541.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9118174 + ... + 9118189.

Almost surely, 2^145890904 is an apocalyptic number.

It is an amenable number.

145890904 is a deficient number, since it is larger than the sum of its proper divisors (127654556).

145890904 is a wasteful number, since it uses less digits than its factorization.

145890904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18236369 (or 18236365 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 145890904 is about 12078.5307053466. The cubic root of 145890904 is about 526.4325548890.

The spelling of 145890904 in words is "one hundred forty-five million, eight hundred ninety thousand, nine hundred four".