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145890904 = 2318236363
BaseRepresentation
bin10001011001000…
…01111001011000
3101011112000200211
420230201321120
5244322002104
622250540504
73421023625
oct1054417130
9334460624
10145890904
1175395aa5
1240a37734
13242c07a3
141553934c
15cc1be04
hex8b21e58

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, 2145890904 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".

Divisors: 1 2 4 8 18236363 36472726 72945452 145890904