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55006890 = 2354342641
BaseRepresentation
bin1101000111010…
…1011010101010
310211111122021020
43101311122222
5103040210030
65242553310
71235356641
oct321653252
9124448236
1055006890
1129060544
1216508836
13b51c373
14743c358
154c68510
hex34756aa

55006890 has 32 divisors (see below), whose sum is σ = 135089856. Its totient is φ = 14327040.

The previous prime is 55006817. The next prime is 55006891. The reversal of 55006890 is 9860055.

It is not an unprimeable number, because it can be changed into a prime (55006891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20031 + ... + 22610.

It is an arithmetic number, because the mean of its divisors is an integer number (4221558).

Almost surely, 255006890 is an apocalyptic number.

55006890 is an abundant number, since it is smaller than the sum of its proper divisors (80082966).

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

55006890 is a wasteful number, since it uses less digits than its factorization.

55006890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42694.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 55006890 is about 7416.6629962538. The cubic root of 55006890 is about 380.3111256206.

The spelling of 55006890 in words is "fifty-five million, six thousand, eight hundred ninety".

Divisors: 1 2 3 5 6 10 15 30 43 86 129 215 258 430 645 1290 42641 85282 127923 213205 255846 426410 639615 1279230 1833563 3667126 5500689 9167815 11001378 18335630 27503445 55006890