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88409 = 211419
BaseRepresentation
bin10101100101011001
311111021102
4111211121
510312114
61521145
7515516
oct254531
9144242
1088409
1160472
12431b5
1331319
142430d
151b2de
hex15959

88409 has 4 divisors (see below), whose sum is σ = 89040. Its totient is φ = 87780.

The previous prime is 88397. The next prime is 88411. The reversal of 88409 is 90488.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 88409 - 212 = 84313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (88469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 420.

It is an arithmetic number, because the mean of its divisors is an integer number (22260).

288409 is an apocalyptic number.

It is an amenable number.

88409 is a deficient number, since it is larger than the sum of its proper divisors (631).

88409 is a wasteful number, since it uses less digits than its factorization.

88409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 88409 is about 297.3365096990. The cubic root of 88409 is about 44.5484050145.

The spelling of 88409 in words is "eighty-eight thousand, four hundred nine".

Divisors: 1 211 419 88409